Honeywell Error Code E353: Sensor Short
Warning: Your Honeywell system has detected a sensor issue and has likely locked out to prevent potential damage. This requires diagnosis and repair.
How to Fix Honeywell Code E353
- Step 1: Check the system air filter. A severely clogged filter can sometimes cause unusual temperature readings and indirectly trigger sensor errors. Replace it if dirty.
- Step 2: Power cycle the system. Turn off the power to your heating/cooling system at the breaker for 5 minutes, then turn it back on. This can sometimes reset the control board and clear the error.
- Step 3: If the error persists after these steps, contact a qualified HVAC technician to diagnose and repair the problem.
How to Reset Honeywell Code E353
- Remove the thermostat from its wall plate.
- Remove the batteries and wait 30 seconds.
- Reinsert the batteries and snap the thermostat back onto the wall plate.
- If the error persists, perform a factory reset through the menu: Menu > Preferences > Restore Factory Defaults.
What does E353 mean?
The Honeywell E353 error code indicates a short circuit has been detected in one of the temperature sensors. These sensors are used to monitor temperatures at various points in your heating or cooling system, such as the supply air, return air, or outdoor temperature. A short circuit means there's an unintended electrical connection, causing the sensor to send incorrect readings to the control board. This can prevent your system from operating correctly, as the control board relies on accurate sensor data to regulate heating and cooling cycles. The system will likely shut down to prevent further issues or potential damage from incorrect operation.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Temperature Sensor | — | — |
| Wiring Harness | — | — |
| Control Board | — | — |