Picking up an Omron blood pressure monitor and staring at a screen full of unfamiliar icons is a surprisingly common experience. A flashing heart. A blinking code that says "E2." A symbol that looks like a person in motion. Each one is communicating something specific about the reading or the device itself — and knowing the difference between a normal indicator and an alert that warrants a phone call to a doctor matters.
This guide covers every common symbol, icon, and error code found across Omron blood pressure monitors, along with equivalent symbols on Relion, Walgreens, and iHealth devices. It also explains how to reset a monitor, when symbol alerts signal a real health concern, and what each error code means in plain terms.
At a Glance: Omron Blood Pressure Monitor Symbols
| Symbol / Code | What It Means | Action Required |
|---|---|---|
| Flashing heart (during reading) | Monitor is detecting pulse | None — normal operation |
| Heart + ECG line (after reading) | Hypertension indicator (reading above threshold) | Repeat reading; consult doctor if persistent |
| IHB symbol | Irregular heartbeat detected | Consult physician if it appears on 3+ consecutive readings |
| Movement icon (person with lines) | Body movement detected during measurement | Retake reading while staying still |
| Cuff "OK" / loose cuff arrow | Cuff wrap quality feedback | Rewrap cuff if arrow shows; proceed if "OK" |
| Low battery icon | Battery charge is low | Replace batteries |
| Bluetooth icon | Bluetooth/Omron Connect app status | Check app pairing if blinking |
| E1 | Cuff pressure or air plug issue | Recheck cuff connection and placement |
| E2 | Movement during inflation | Stay still and retake |
| E3 / ERR3 | Cuff inflation failure | Recheck cuff; replace if leaking |
| E4 | Irregular pulse signal | Rest and retake; consult doctor if persistent |
| E5 | Cuff over-pressurized | Reconnect cuff; seek support if recurring |
| "HI" | Reading above measurable range | Recheck cuff; contact physician |
| "LO" | Reading below measurable range | Recheck cuff placement |
Overview of Omron Blood Pressure Monitor Display Symbols
Omron blood pressure monitors use two distinct categories of display symbols: health indicators and device status alerts. Health indicators communicate something about the reading itself — pulse detection, hypertension range, or heart rhythm. Device status alerts communicate something about the monitor's operating state — battery level, Bluetooth connection, cuff fit, or a measurement error.
Understanding which category a symbol falls into helps prioritize what to do next. A device status alert usually means recheck the cuff or replace the batteries. A health indicator may mean retaking the measurement or, if the pattern repeats, following up with a physician.
Omron's official user manuals document symbols model by model, since some icons appear only on higher-series devices (the 7 Series, 10 Series, or Evolv) and not on entry-level monitors.
The flashing heartbeat symbol during measurement
The heartbeat symbol — a small heart icon that flashes rhythmically during inflation and deflation — confirms the sensor is actively detecting a pulse. It is not an alert. It simply means the monitor is working as intended. Once the reading is complete, if this symbol stays on the display alongside a blood pressure reading, it has shifted function: it is now a hypertension indicator (see next section).
The hypertension indicator (heart + ECG-style line)
On most Omron models, the heartbeat symbol illuminates or flashes after the reading if the result exceeds the home measurement threshold of 135 mmHg systolic or 85 mmHg diastolic. This threshold comes directly from Omron's device manuals and is based on guidelines for home blood pressure monitoring.
One important clarification: the American Heart Association defines clinical hypertension as 130/80 mmHg or above. Omron's home monitor thresholds are set slightly higher at 135/85 mmHg, which is the standard for home-based measurement referenced in clinical validation studies. A reading that triggers the hypertension symbol on an Omron monitor may still be worth discussing with a physician even if it does not appear dramatically elevated.
Newer Omron models (2024 onward, including some 7 Series and 10 Series devices) display H1 or H2 after a reading. These indicate hypertension stage groupings based on reading severity. H1 typically corresponds to Stage 1 hypertension and H2 to Stage 2. These are informational — they do not replace a physician's assessment.
Morning hypertension symbol
Some Omron monitors with memory averaging functions display a dedicated morning hypertension symbol when the average of stored morning readings for the week exceeds 135/85 mmHg. This symbol appears when reviewing stored memory averages, not during a live reading. It is particularly relevant because morning blood pressure spikes carry independent cardiovascular significance — a doctor can advise on what morning readings mean for individual cases.
The IHB (Irregular Heartbeat) Symbol — What It Means and When to Act
The IHB (Irregular HeartBeat) symbol is the display icon most likely to cause concern. It appears as a heart icon with a disrupted or extra line, depending on the model. On some devices it is labeled explicitly as "IHB."
What triggers the IHB symbol
Omron monitors detect an irregular heartbeat when the pulse rhythm during a measurement deviates by more than 25% above or below the average rhythm recorded during that same measurement. This detection method is documented in Omron's official user manuals and is consistent across the 3 Series, 5 Series, 7 Series, and 10 Series upper-arm models.
The IHB symbol does not diagnose atrial fibrillation (AFib) or any other arrhythmia. It signals that the rhythm during one measurement session was irregular enough to exceed the monitor's detection threshold. Confirmation of any arrhythmia requires an electrocardiogram (ECG) performed by a clinician.
Research published by Stergiou et al. in Hypertension (2018) on blood pressure monitor validation emphasizes that home monitors provide screening-level information, not diagnostic certainty — a useful frame for understanding what the IHB symbol communicates.
Common causes of false IHB alerts
Several non-cardiac factors can trigger the IHB symbol:
- Moving the arm or body during the measurement
- Talking during inflation or deflation
- Caffeine, alcohol, or nicotine within 30 minutes of the reading
- Deep or irregular breathing patterns during the measurement
- Cuff wrapped too loosely, causing inconsistent pressure readings
If the IHB symbol appeared once during an otherwise normal reading, retaking the measurement while remaining completely still is the appropriate first step.
When to contact a physician
A single IHB alert on its own, particularly if it does not recur, does not require immediate action. However, a physician visit is appropriate if:
- The IHB symbol appears on three or more consecutive readings taken correctly (still, seated, cuff properly placed)
- The IHB symbol is accompanied by symptoms such as palpitations, shortness of breath, chest discomfort, or dizziness
- The symbol recurs repeatedly over several days despite correct measurement technique
A doctor can determine whether further monitoring — including a Holter monitor or ECG — is appropriate for individual circumstances.
Movement and Positioning Error Symbols Explained
Body movement detection icon
The movement error symbol displays the outline of a person, often with motion lines above the shoulders, indicating that body movement was detected during the measurement. This symbol means the reading may be inaccurate and should be retaken.
Per Omron's user guidance, the correct measurement posture is: seated with back supported, feet flat on the floor, arm resting on a table at heart level, palm facing upward, no talking or movement from inflation until the reading is complete. Waiting 5 minutes before taking a reading — and avoiding caffeine, tobacco, and exercise for 30 minutes prior — further reduces movement-related errors.
Cuff wrap quality symbols
Most current Omron models include a cuff wrap guide symbol that provides real-time feedback on cuff placement:
- "OK" inside a circle: The cuff is wrapped with appropriate pressure. Proceed normally.
- Downward arrow beside the cuff icon: The cuff is too loose. Remove the cuff, rewrap it snugly (able to fit two fingers underneath, as recommended by the Mayo Clinic), and retake the reading.
A loosely wrapped cuff is one of the most common causes of inaccurate readings. Cuff size also matters: using a cuff that is too small for the arm circumference can produce falsely elevated readings, while an oversized cuff can produce falsely low ones.
Wrist monitor position indicator
Wrist monitors (such as the Omron BP654 series) include an arm position indicator that lights up or flashes when the wrist is not at heart level. This indicator is specific to wrist-style monitors and does not appear on upper-arm devices. Wrist monitors are more position-sensitive than upper-arm monitors because the measurement site is farther from the heart — small changes in height affect the reading. Keeping the wrist elevated to heart level (with the elbow supported on a flat surface, palm upward) is required for an accurate result.
Full Omron Error Code Guide: E1, E2, E3, E4, E5 — Causes and Fixes
Error codes on Omron monitors appear as "E" followed by a number. Each one has a distinct cause and a corresponding fix. The table below covers all five codes documented across current Omron models.
| Error Code | What It Means | Most Common Cause | Fix |
|---|---|---|---|
| E1 | Cuff pressure issue or air plug disconnected | Air tube not fully connected; cuff not on arm during start | Check air tube connection; ensure cuff is on arm before pressing START |
| E2 | Excessive movement during measurement | Talking, moving arm, or crossing legs during inflation | Retake reading while remaining completely still |
| E3 / ERR3 | Cuff failed to inflate to required pressure | Air leak in cuff or tube; cuff wrapped too loosely | Inspect cuff and tube for damage; rewrap snugly; replace cuff if leaking |
| E4 | Irregular pulse signal during measurement | Weak or inconsistent pulse detection | Rest 5 minutes; retake; if persistent, consult a physician |
| E5 | Cuff pressure exceeded safe upper limit | Cuff wrapped too tightly; possible sensor issue | Loosen cuff and retake; if E5 recurs across multiple attempts, contact Omron support |
E1 on Omron blood pressure monitor
An E1 error most commonly means the air tube is not fully inserted into the monitor's air jack, or the cuff was not on the arm when the START button was pressed. Disconnecting the air tube completely, waiting 10 seconds, and reconnecting it firmly before placing the cuff and retaking the reading resolves the majority of E1 errors. If E1 persists after correct setup, the cuff itself may need to be replaced.
E2 on Omron blood pressure monitor
E2 errors are almost always the result of movement. The monitor detects that arm position, talking, or body motion occurred during inflation or deflation. Sitting still, keeping the arm relaxed and supported, and avoiding conversation from the moment the START button is pressed until the reading appears on screen eliminates most E2 errors.
E3 / ERR3 on Omron blood pressure monitor
ERR3 (displayed as E3 on some models and "Err3" on others) signals a failure to reach the inflation pressure needed for an accurate reading. The most common cause is an air leak — either a small hole in the cuff bladder or a loose connection between the air tube and the monitor. Running a finger along the tube while pressing START will sometimes reveal a hissing leak. A cuff that shows ERR3 repeatedly despite a firm tube connection should be replaced.
E4 on Omron blood pressure monitor
E4 indicates the monitor received an inconsistent pulse signal during measurement. This can happen in people with very low pulse rates (under 40 bpm), certain arrhythmias, or in cases where movement or incorrect cuff placement disrupted signal detection. Resting quietly for 5 minutes before retaking usually resolves E4. If E4 appears consistently, a physician visit is appropriate to rule out an underlying pulse irregularity.
E5 on Omron blood pressure monitor
E5 means the cuff pressure exceeded the monitor's safe upper measurement limit. This occasionally occurs if the cuff was wrapped very tightly, or if there is a sensor fault in older devices. Loosening the cuff, ensuring it is snug but not constricted, and retaking the reading is the first step. If E5 appears on multiple attempts with a correctly applied cuff, contacting Omron's support line is the appropriate next step, particularly for devices still under warranty.
"HI" and "LO" messages
"HI" appears when the systolic reading is above 280 mmHg, beyond the monitor's measurable upper range. Before assuming an extremely high reading, check for a kinked tube or a cuff applied over clothing — both can cause falsely inflated pressure readings. "LO" appears when the reading falls below the monitor's lower range, most commonly from a very loose cuff or incorrect arm positioning.
Symbols on Relion, Walgreens, and iHealth Monitors: Cross-Brand Guide
The same core symbols appear across most major home blood pressure monitor brands, though the exact icons vary slightly by manufacturer.
Relion blood pressure monitor symbols and error codes
Relion monitors (sold through Walmart) use a symbol set closely aligned with Omron's, since both use oscillometric measurement technology. Per Relion's official support documentation, common Relion symbols include:
- Heart icon (flashing during reading): Pulse detection active
- Irregular heartbeat indicator: Same function as Omron's IHB symbol — triggered when pulse deviation exceeds the detection threshold
- Movement indicator: Body motion detected; retake required
- E1 / E2 / E3: Error codes with functionally identical meanings to Omron's E1, E2, and E3 codes
Relion error code "E3" specifically maps to cuff inflation failure, the same cause as Omron's ERR3.
Walgreens blood pressure monitor symbols
Walgreens-branded monitors (often manufactured by A&D Medical or a private-label equivalent) use similar iconography. The irregular heartbeat symbol typically appears as two overlapping heart outlines or a heart with a disrupted line pattern. Error codes follow the same E1/E2/E3 convention. The cuff wrap indicator uses an arrow system comparable to Omron's loose-cuff alert.
iHealth blood pressure monitor symbols
iHealth monitors, designed primarily for Bluetooth app integration, use icons that blend device status symbols with app-connectivity indicators. The IHB symbol appears as a heart with a wavy or interrupted line. iHealth's error codes are documented within the iHealth MyVitals or iHealth Track app rather than exclusively on the device display, which means consulting the app for error code explanations is necessary for iHealth users.
Key takeaway across all brands: The IHB (irregular heartbeat) symbol, movement error icon, low battery indicator, and E1/E2/E3 error codes carry functionally consistent meanings regardless of which brand of oscillometric monitor is being used.
Battery and Signal Indicator Icons
Low battery symbol
The low battery symbol on Omron monitors appears as a battery outline with a low-fill indicator, often accompanied by a flashing animation. Per Omron's manual guidance, replacing batteries when this symbol first appears — rather than waiting for the device to stop functioning mid-reading — is recommended, since deteriorating batteries can affect measurement accuracy before the device fails completely.
Omron upper-arm monitors use four AA alkaline batteries. Omron recommends alkaline batteries specifically; carbon-zinc or rechargeable NiMH batteries can produce inconsistent voltage output that affects accuracy. Remove batteries if the device will not be used for three months or longer to prevent corrosion.
Bluetooth and Omron Connect app icon
Models with Bluetooth connectivity (including the 5 Series BP5250, 7 Series BP7350, 10 Series BP7450, and Evolv BP7000) display a Bluetooth symbol that indicates pairing status. A solid Bluetooth icon means the monitor is paired and connected to the Omron Connect app. A flashing Bluetooth icon typically means the monitor is in pairing mode or has lost its connection to the paired device.
If readings are not syncing to the Omron Connect app, standard troubleshooting steps include: ensuring Bluetooth is enabled on the phone, keeping the phone within 16 feet (5 meters) of the monitor during a reading, restarting the app, and confirming the app is updated to the current version.
Memory and average value symbol
When the memory button is pressed on Omron monitors with storage capability, a memory indicator symbol appears. Holding the memory button for more than 3 seconds on most models displays the average of the last three readings. Some models also show a morning average and evening average symbol when scrolling through stored memory — indicated by small "AM" and "PM" labels alongside the average value icon.
How to Reset Your Omron Blood Pressure Monitor
A reset is occasionally necessary when a monitor displays persistent error codes after correct cuff placement, when stored memory needs to be cleared, or when Bluetooth pairing needs to be re-established. The reset process varies slightly by model, but the general steps apply across most Omron upper-arm devices.
Soft reset (battery removal)
- Remove all batteries from the battery compartment.
- Wait a full 2 minutes before reinserting them.
- Reinsert batteries with correct polarity (as indicated inside the battery compartment).
- Press the START/STOP button to confirm the device powers on normally.
A soft reset clears temporary errors and restarts the monitor's internal processor. It does not erase stored blood pressure readings.
Bluetooth re-pairing reset
For Bluetooth-enabled models, if the monitor needs to be paired to a new phone or re-paired after a connection issue:
- Ensure the monitor is powered off.
- Press and hold the Bluetooth/connection button for more than 2 seconds until the Bluetooth icon flashes.
- Open the Omron Connect app on the phone and follow the in-app pairing instructions.
Full pairing instructions for individual models are available through Omron Healthcare's support page.
Memory clear
To clear all stored readings from memory (where supported), consult the specific model's manual. On most Omron devices, a memory clear requires pressing a combination of buttons simultaneously while the monitor is off — the exact combination varies by model. Clearing memory does not affect the device's calibration or Bluetooth pairing status.
For those looking to track heart health at home over time, exporting or noting down stored readings before a reset ensures historical data is not lost.
When to Call a Doctor Based on Monitor Readings or Symbol Alerts
Home blood pressure monitors are screening tools. They provide useful data for tracking trends over time and for sharing with a physician, but they do not diagnose conditions. The American Heart Association recommends taking two or three readings per session, one minute apart, at the same time each day, for at least a week before drawing conclusions about blood pressure patterns.
Scenarios that warrant a physician consultation
| Situation | Recommended Action |
|---|---|
| IHB symbol on 3+ consecutive properly-taken readings | Schedule a physician visit; mention the symbol and frequency |
| IHB symbol with symptoms (palpitations, breathlessness, chest discomfort, dizziness) | Contact a physician promptly |
| Readings consistently at or above 135/85 mmHg (home threshold) | Discuss readings with a physician |
| "H2" stage indicator appearing regularly | Schedule a physician visit to review blood pressure management |
| Morning hypertension symbol appearing on weekly averages | Discuss with a physician — morning BP elevation carries independent cardiovascular significance |
| Persistent E4 error despite correct technique | Physician evaluation to assess pulse regularity |
| "HI" reading after confirming correct cuff placement | Contact a physician; do not attempt to retake reading repeatedly |
A single elevated reading does not indicate hypertension. Blood pressure is dynamic and fluctuates throughout the day based on activity, stress, hydration, and time of day. A physician assesses patterns across multiple readings over time rather than reacting to any one measurement.
If readings consistently fall within a range that triggers the hypertension indicator or H1/H2 symbols, a clinically accurate blood pressure device verified through a physician visit provides important context that home monitoring alone cannot supply.
Frequently Asked Questions
What does the heart symbol on an Omron blood pressure monitor mean?
The heart symbol has two distinct functions depending on when it appears. During a reading, it flashes with each detected heartbeat, confirming the monitor is detecting the pulse normally. After a reading is complete, if the heart symbol remains lit or flashes alongside the blood pressure numbers, it is a hypertension indicator, signaling that the reading exceeded 135/85 mmHg, the home monitoring threshold used in Omron devices.
What do the symbols on my blood pressure monitor mean?
Blood pressure monitor symbols fall into two categories: health indicators (irregular heartbeat, hypertension range, movement error) and device status symbols (battery level, Bluetooth connection, memory). The most clinically significant symbols are the IHB (irregular heartbeat) indicator and the hypertension indicator. Device status symbols — such as the low battery icon or cuff wrap alert — indicate a setup or equipment issue rather than a health concern.
What does E5 mean on an Omron blood pressure monitor?
E5 means the cuff pressure during inflation exceeded the monitor's safe upper limit. This can happen when the cuff is wrapped very tightly around the arm. Loosening the cuff to allow two fingers to fit underneath and retaking the reading resolves most E5 errors. If E5 appears on multiple attempts with a correctly fitted cuff, contacting Omron's support line is the appropriate next step.
What does IHB mean on a blood pressure monitor?
IHB stands for Irregular HeartBeat. The symbol appears when the monitor detects a pulse rhythm that deviates by more than 25% from the average rhythm recorded during that measurement. A single IHB alert can result from movement, breathing irregularities, or other non-cardiac causes. If the IHB symbol appears on three or more consecutive readings taken correctly, a physician visit is appropriate to determine whether further evaluation is needed.
Why does my Omron blood pressure monitor show an error code?
Error codes on Omron monitors (E1 through E5) indicate a specific issue with how the measurement was taken or with the device hardware. The most common causes are an improperly connected air tube (E1), movement during the reading (E2), an air leak in the cuff (E3), or an inconsistent pulse signal (E4). Reviewing the error code definitions above, checking the cuff connection, and retaking the measurement while remaining completely still resolves the majority of error codes.
References
- Omron Healthcare. Official Blood Pressure Monitor User Manuals and Support. https://www.omronhealthcare.com/support/
- Stergiou GS, et al. "A Universal Standard for the Validation of Blood Pressure Measuring Devices." Hypertension. 2018. https://doi.org/10.1161/HYPERTENSIONAHA.117.10237
- American Heart Association. Understanding Blood Pressure Readings. https://www.heart.org/en/health-topics/high-blood-pressure/understanding-blood-pressure-readings
- Mayo Clinic. Blood pressure cuff: Does size matter? https://www.mayoclinic.org/diseases-conditions/high-blood-pressure/expert-answers/blood-pressure-cuff/faq-20058337
- Relion Official Support Documentation. https://www.relionproducts.com
