Home and Auto AC unit issue

**TrebMaxx** · 10-09-2022, 03:35 PM

For any of the experts with HVAC. I had our 22 year old system replaced, furnace and the outside AC unit in late August. Everything has been good since the switch out. This weekend the late night temps dropped enough to switch over from cool to heat. The furnace came on and the desired temp was reached. As I was working around the house this morning I noticed that my outside AC unit was running. My wife said she noticed it had been running constantly since switching over. This is not a heat pump unit so it should not be running when heat is on. Any suggestions on what would cause this?

Jewish Rabbi · 10-09-2022, 03:36 PM

Sounds like your AC unit is running when it shouldn’t be.

LiveSteam · 10-09-2022, 03:51 PM

I had a sticky magnetic contact switch, that would allow the AC to run nonstop and it only had half of last summer on it.
Next time it happens.
Use a well insulated screwdriver to pull the contact to the off position while it's running when it shouldn't be running.
If the contact stays in the off position? You have a bad switch. If it instantly snaps back into the ON position? You probably have a bad thermostat that is sending a ghost signal to the contact switch.
Part should look something like this
https://www.google.com/search?q=ac+c...3074108-115Z63

Things I've learned from Bugs over the years.

Abba-Dabba · 10-09-2022, 03:56 PM

Quote:

Originally Posted by TrebMaxx

For any of the experts with HVAC. I had our 22 year old system replaced, furnace and the outside AC unit in late August. Everything has been good since the switch out. This weekend the late night temps dropped enough to switch over from cool to heat. The furnace came on and the desired temp was reached. As I was working around the house this morning I noticed that my outside AC unit was running. My wife said she noticed it had been running constantly since switching over. This is not a heat pump unit so it should not be running when heat is on. Any suggestions on what would cause this?

Call the company you had put it in. You had it installed less than 2 mos. ago I can't see why they couldn't handle this free of charge.

In other words I wouldn't be sticking any screwdrivers in it any where myself.

LiveSteam · 10-09-2022, 03:59 PM

No. Not if it's under warranty

**TrebMaxx** · 10-09-2022, 04:06 PM

Thanks for the replies. I was just wondering if it was something easy like resetting something so I could save some of my vacation time. It is under warranty and I will be giving them a call in the morning. I have the main breaker by the unit pulled out for now so it doesn't keep running.

jd1020 · 10-09-2022, 04:26 PM

What exactly do you mean by your AC unit is running? Is the compressor actually running or is it just the fan?

It sounds like its just the fan if your house is being heated. If that's the case its probably a relay or short somewhere in the wiring.

Chief Roundup · 10-09-2022, 04:32 PM

Kill the power and see if it resets the issue. Should have a disconnect within 6 feet of the condenser. There should be a switch by the furnace to turn the power off to it as well. If that doesn't fix the issue turn it back off and call the installer. Definitely still under warranty.

**ptlyon** · 10-09-2022, 04:37 PM

Quote:

Originally Posted by RubberSponge

In other words I wouldn't be sticking any screwdrivers in it any where myself.

Pussy. You can't be a Chiefs fan.

10-09-2022, 03:35 PM
TrebMaxx Supporter Join Date: Nov 2005 Location: Peoples Republic of CoMo Casino cash: $-2212748	AC unit issue For any of the experts with HVAC. I had our 22 year old system replaced, furnace and the outside AC unit in late August. Everything has been good since the switch out. This weekend the late night temps dropped enough to switch over from cool to heat. The furnace came on and the desired temp was reached. As I was working around the house this morning I noticed that my outside AC unit was running. My wife said she noticed it had been running constantly since switching over. This is not a heat pump unit so it should not be running when heat is on. Any suggestions on what would cause this?
Posts: 4,451

10-09-2022, 03:36 PM	#2
Jewish Rabbi What's up braj? Join Date: Jun 2008 Location: Placencia, Belize Casino cash: $-1586750	Sounds like your AC unit is running when it shouldn’t be.
Posts: 16,914	2 0

10-09-2022, 03:51 PM	#3
LiveSteam The Constitutional Choo choo Join Date: Dec 2009 Location: homeof43conferencetitles Casino cash: $-1474568	I had a sticky magnetic contact switch, that would allow the AC to run nonstop and it only had half of last summer on it. Next time it happens. Use a well insulated screwdriver to pull the contact to the off position while it's running when it shouldn't be running. If the contact stays in the off position? You have a bad switch. If it instantly snaps back into the ON position? You probably have a bad thermostat that is sending a ghost signal to the contact switch. Part should look something like this https://www.google.com/search?q=ac+c...3074108-115Z63 Things I've learned from Bugs over the years. __________________ Progressivism.. The Politically Correct way of saying "I'm a Communist slash Nazi" depending on what the issue of the day is? Last edited by LiveSteam; 10-09-2022 at 03:57 PM..
Posts: 44,692

10-09-2022, 03:59 PM	#5
LiveSteam The Constitutional Choo choo Join Date: Dec 2009 Location: homeof43conferencetitles Casino cash: $-1474568	No. Not if it's under warranty __________________ Progressivism.. The Politically Correct way of saying "I'm a Communist slash Nazi" depending on what the issue of the day is?
Posts: 44,692	1 0

10-09-2022, 04:06 PM	#6
TrebMaxx Supporter Join Date: Nov 2005 Location: Peoples Republic of CoMo Casino cash: $-2212748	Thanks for the replies. I was just wondering if it was something easy like resetting something so I could save some of my vacation time. It is under warranty and I will be giving them a call in the morning. I have the main breaker by the unit pulled out for now so it doesn't keep running. __________________
Posts: 4,451

10-09-2022, 04:26 PM	#7
jd1020 In Search of a Life Join Date: Nov 2010 Casino cash: $7042645	What exactly do you mean by your AC unit is running? Is the compressor actually running or is it just the fan? It sounds like its just the fan if your house is being heated. If that's the case its probably a relay or short somewhere in the wiring.
Posts: 24,501

10-09-2022, 04:32 PM	#8
Chief Roundup Admitted Planet Junky Join Date: Oct 2000 Casino cash: $-1378373	Kill the power and see if it resets the issue. Should have a disconnect within 6 feet of the condenser. There should be a switch by the furnace to turn the power off to it as well. If that doesn't fix the issue turn it back off and call the installer. Definitely still under warranty. __________________ Fanaticism is nowhere. There is no tenderness or humanity in fanaticism.
Posts: 19,547