11-13-2018, 07:43 PM | #1 |
Registered User
Join Date: Apr 2017
Location: Minneapolis, MN
Posts: 49
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Need HVAC help
I installed a used comfort pack (similar to magic pack) in my garage. It had a cracked heat exchanger so I replaced that. Looking to see if there are any HVAC techs who can steer me in the right direction.
Symptom: With thermostat set to "fan on", the fan will run for 10-13 minutes and then shut off. No squeeling noise or anything like that. It will not turn back on until it has sat for a while. It does the same thing if the heat cycle runs for too long or too frequent, the fan shuts off and the flame stays on. Of course that trips the limit switch when the heat exchanger gets too hot. I have checked the voltage coming into the circuit board, it seems good. I checked the start/run capacitor, tested good. I checked the draw on the fan motor and it stayed right at 3 amps and never spiked. any ideas?!?!? I had a HVAC technician come out and he said "i'm scratching my head on this one" |
11-13-2018, 10:42 PM | #2 |
Senior Member
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,217
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Re: Need HVAC help
Bad motherboard
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
11-15-2018, 05:24 PM | #3 |
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Join Date: Oct 2011
Location: Tucson, AZ
Posts: 639
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Re: Need HVAC help
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11-17-2018, 03:56 PM | #4 |
Senior Member
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,217
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Re: Need HVAC help
we try but i maybe wrong lol
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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