I moved into my house 1 year ago. The home had a remodel in 2005, including Amana furnace #ams90453bxa
Manual.
This summer I had an A/C installed (this was not a replacement but a new unit). The heater worked last year, though we didn't use it much. We used it once this summer around 2-3 weeks ago for a few minute to warm up the home. I tried to use the furnace a few nights ago, and it sounded like the furnace was trying to turn on but not heat would come out. I could manually start the fan, so I knew that was working. I checked the breaker and everything looked OK. Yesterday, I finally made it up to the attic. I could see 3 flashing red lights by the circuit board.
A Google search led me a DIY site which indicates that 3 flashing red lights means "pressure switch stuck open". Research indicates that Goodman makes the Amana furnaces. I found this Goodman manual (see page 29) which also indicates the 3 flashing lights are due to the pressure switch. I found during my Google search that sometimes the pressure switch will correct itself if power is cut off from the furnace.
So I flipped all the breakers for a few minutes, turned everything back on, and then the heater was working again. I could see the big flame inside the furnace. I let it run for around 30 minutes and used the heater again last night for another 30 minutes. I thought everything was golden. Then this morning, when I tried to turn the furnace on, I was back to square one: no heat but noise from the unit.
I went up to the attic and unplugged the unit from the wall for a few minutes to see if that would reset it again. It did not. I tried disconnecting the hoses from the pressure switch to the motor, blowing them to clean them out, and cleaning the inlets with a paper clip. Everything seemed immaculate to me. I tried firing up the furnace again, no go. I then unplugged it from the wall for around 30 minutes, plugged it back in, and it worked fine again.
I am just wondering what other troubleshooting I should try before calling out an expert. Is this possibly related to the A/C install from a few months ago? I do have a home warranty for my home that I could utilize if needed. I just wanted to seek some advice from you experts on what I should do next. Thanks for any help!
Manual.
This summer I had an A/C installed (this was not a replacement but a new unit). The heater worked last year, though we didn't use it much. We used it once this summer around 2-3 weeks ago for a few minute to warm up the home. I tried to use the furnace a few nights ago, and it sounded like the furnace was trying to turn on but not heat would come out. I could manually start the fan, so I knew that was working. I checked the breaker and everything looked OK. Yesterday, I finally made it up to the attic. I could see 3 flashing red lights by the circuit board.
A Google search led me a DIY site which indicates that 3 flashing red lights means "pressure switch stuck open". Research indicates that Goodman makes the Amana furnaces. I found this Goodman manual (see page 29) which also indicates the 3 flashing lights are due to the pressure switch. I found during my Google search that sometimes the pressure switch will correct itself if power is cut off from the furnace.
So I flipped all the breakers for a few minutes, turned everything back on, and then the heater was working again. I could see the big flame inside the furnace. I let it run for around 30 minutes and used the heater again last night for another 30 minutes. I thought everything was golden. Then this morning, when I tried to turn the furnace on, I was back to square one: no heat but noise from the unit.
I went up to the attic and unplugged the unit from the wall for a few minutes to see if that would reset it again. It did not. I tried disconnecting the hoses from the pressure switch to the motor, blowing them to clean them out, and cleaning the inlets with a paper clip. Everything seemed immaculate to me. I tried firing up the furnace again, no go. I then unplugged it from the wall for around 30 minutes, plugged it back in, and it worked fine again.
I am just wondering what other troubleshooting I should try before calling out an expert. Is this possibly related to the A/C install from a few months ago? I do have a home warranty for my home that I could utilize if needed. I just wanted to seek some advice from you experts on what I should do next. Thanks for any help!
