Hi everyone, I hope you can help me.
I've had the honeywell rth7500d for 5 years and all a sudden having this problem; The heater comes on along the fan, A/C does not come on neither does the fan, The fan only mode also does not work. I check the breaker and it's OK, no switch off/on at the A/C or the heater.

Please help. I know if I call someone they just going to say change the A/C