When your Lennox XP25 heat pump displays error code 443, it means there's a mismatch between the unit code and inverter model. This issue requires professional assistance to resolve, as it involves … [Read more...]
Lennox XP25 Heat Pump Error Code 436: Inverter Heat Sink Overtemperature Detected
If you're seeing Error Code 436 on your Lennox XP25 heat pump, it means the inverter heat sink is overheating. This might happen during winterizing when the heat pump is working overtime. Poor … [Read more...]
Lennox XP25 Heat Pump Error Code 435: Inverter EEPROM Checksum Error Detected
Your Lennox XP25 heat pump's error code 435 indicates an inverter EEPROM checksum error, which can bring your entire system to a grinding halt. This error code points to a fault in the inverter's … [Read more...]
