My blower motor stops working almost every night! I have no issues during the day. If the motor kicks on it works fine but when the thermostat reaches temperature and shuts the unit off it’s a 50/50 chance if the blower will work in the next cycle after dark. The condenser will kick on but the blower will not so I have to turn the unit off. The next morning I can turn the unit back on and it works fine. It also does this with the heat. It’s a gas unit. I have had the board changed and thermostat wires replaced with no luck. I am out of ideas in this one. My ac guy can’t figure it out either
Motor controller and or run start capacitor (s) are going bad. That's my first guess. It works when cold(not used for a while) then once used it gets hot ad does not work.
I think we are out of DIY territory if the problem is in the ac side of the system, With the limited info provided I would be looking at a low pressure safety switch on the compressor. There are both low pressure and high pressure switches to protect the system, as the temperature drops the Freon vapor pressure drops, if the pressure is below the set point this keeps the compressor from damage and the condenser should not be used with a gas furnace so it may be a problem with the controls are there any lights on the control board. What is the model #. Since it only fails after dark . almost all condensers have a contactor or relay and a start / run capacitor but as it is failing after dark I would look at Freon pressure for the AC but only a control board / programible thermostat explains the gas system not working, I would check the thermostat first and to have the Freon pressure checked you do need a licensed hvac tech.