Help with A/C

Hello. Could your coil be freezing up. Might be worth checking.

We have had that happen

This link might be helpful.

https://byrdheatingandair.com/articles/simple-steps-to-troubleshoot-a-frozen-evaporator-coil

I agree , it could be the coil, but I'm a fan of calling in a professional to check it out.

There are some things that I pay to have done and this would be one of them. How old is the unit you are referring to?

Have you called the company that made it and asked them?

I agree about calling in an HVAC professional. We have the same time of central air and heat and it is too involved for most DIYers. Hopefully, it's a simple repair, like a faulty switch. Good luck and stay safe!

Is your A/C unit installed in a window? or is it integrated with your HVAC/furnace and thermostat? If it is not the latter, no need to call an HVAV repair person.

If it is a window unit, yes, unfortunately the coils do freeze up now and again, especially if you have had the unit turned on for extended periods, and/or on High setting.

The 'fix' is to shut the entire unit off for as much time as it takes for the coils to thaw.

When you have been turning the unit on Heat, the fan is blowing the hot air on to the frozen coils, and thawing them. By simply turning the entire unit Off, the coils will thaw out on their own, without having the room become extra hot due to the blowing hot air.

https://www.youtube.com/watch?v=F7vCs-gTWFo

Sounds like it's a fan motor problem. Most fan motors are three to four speed. Low and medium low usually for heat. Medium high and high for cooling. Since you hear a slight humming noise the med-high or high speed windings are more likely shorted. When you put the heat on first and switch to cool the lower motor speed stays on. Get an HVAC tech. The fan motor may need to be replaced. he can check the operation with it out of the unit.

sounds like a setting issue. Check the manual and make sure you are using the correct settings.

It sounds like it might be low of Freon. Check to see if there is any signs of icing over.

I am assuming this is a heat pump. Could be fan motor and/or the reversing valve, or the mechanism that actuates it ie: the coil could have a problem.. ugh....heat pumps always have so many issues with switching back and forth with different seasons. I don't think it's good for the unit to switch that quickly from heat to AC. I thought you were supposed to wait a while before doing that. What a pain! Yeah, unfortunately I would call a technician to really narrow it down.

Call your local HVAC contractor. They can diagnose and fix your problem (correctly). We have our HVAC checked twice a year to ensure it works well.

Soooo...I called the professionals as many of you suggested. It was a faulty wire leading into the relay for the blower motor. $50 and 1 hour later and we're back to business as usual.

Thanks for all of the help!