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Old 11-13-2018, 07:43 PM   #1
wake328
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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"
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Old 11-13-2018, 10:42 PM   #2
truckdude239
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Re: Need HVAC help

Bad motherboard
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Old 11-15-2018, 05:24 PM   #3
mikebte
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Re: Need HVAC help

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Originally Posted by truckdude239 View Post
Bad motherboard
How awesome is that, love this forum.

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Old 11-17-2018, 03:56 PM   #4
truckdude239
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Re: Need HVAC help

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Originally Posted by mikebte View Post
How awesome is that, love this forum.

we try but i maybe wrong lol
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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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