I have a Aqualcal pool heat pump that has been working fine until yesterday.
The heater is running but not heating, it’s not leaking, there are no obstructions or strange noises or any other signs that might lead me to focus in on anything keeping it from heating.
I hosed down the outer coils, cleaned the filter and everything seems to be flowing and working properly.
The heater is about 5 years old and used most days for the last three for the spa.
Before I call a repairman, is there anything I could check?