E7 -- Heating temperature probe Water temperature sensor is faulty
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Gas heating hot water furnace heating temperature probe warm water temperature sensor open or short circuit;
failure cause
1. Heating temperature probe The heating temperature sensor is faulty.
2. The probe cable of the heating temperature sensor falls off or is virtual-connected.
3. The primary controller or line is faulty.
Troubleshooting: This problem needs to be solved with the after-sales technical personnel;