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typhoon55 04-29-2008 08:36 AM

carrier cycling on and off
carrier propane furnace 58SX series 170
unit will fire up and ignite but will shut burner off when blower kicks on.
this cycle will repeat itselfi bypassed the limit switch to test but still cycling

UBoiler 04-30-2008 09:02 PM

U gotta give us little bit more info brother. The reason that stands out is that a few of us have read your situation and not responded. I seriously have re-read it 5 times and I'm still not sure what problem is, how you've tried to trouble shoot, and what you think the solution is? The other thing that gets my attention is propane and I'm not real familiar with propane except for potato canons. Please give us more information or re-post with improved more thorough info. Good luck. Cliff

sgthvac 05-03-2008 07:57 PM

PHP Code:

carrier propane furnace 58SX series 170
unit will fire up 
and ignite but will shut burner off when blower kicks on.
this cycle will repeat itselfi bypassed the limit switch to test but still cycling 

58sx? I know it's old, but as UBoiler said not enough info. If I was to guess the circuit board is causing the problem, but that's a guess. Could also be gas pressure, an aux. limit, etc. etc.

Aceinstaller 05-08-2008 09:44 PM

flame rollout when blower kicks on?

if so, possible bad heat exchanger.

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