H70 — Back-up heater OLP abnormality

What does H70 mean?

The Overload Protector (OLP) for the back-up heater has detected an issue, indicating either a disconnection or activation due to an overload. This error triggers if the abnormality continues for 60 seconds.

• Back-up heater OLP is disconnected.
• Back-up heater OLP has activated due to an overload.

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit at the main breaker and wait at least 5 minutes to allow the system to cool down and reset.

2. 2

   Check your home's electrical panel for any tripped circuit breakers specifically labeled for the heating system.

3. 3

   If the error persists, contact a qualified technician to inspect the back-up heater and its OLP.