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Dr Quick

M'boro, Tn

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Posted: 09/12/17 06:37pm Link  |  Quote  |  Print  |  Notify Moderator

My furnace will light and run for about 5 seconds, then quit for maybe 30 seconds and try to light again. It does this 3 times then shuts down. You can turn off thermostat and it will cycle and keep on doing the same thing again.
Have you had this problem and want what was done to solve problem and get furnace running again
Thanks

Additional information: Trailer is only just over 2 years old, so furnace is out of warranty. In that 2 years we have camped say 65 days and maybe used the furnace 15 or 20 nights.
I did one test of the furnace where I turned on all three stove burners then turned on the furnace to see if gas pressure would drop. but when furnace lit for a few seconds, gas flames on stove never changed. So I do not think it is a gas or regulator problem.

* This post was edited 09/14/17 07:38am by Dr Quick *


Dr Quick

SidecarFlip

Deerfield, Michigan

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Posted: 09/12/17 06:43pm Link  |  Quote  |  Print  |  Notify Moderator

3 rimes and it locks out. That is SOP. Could be as simple as a bad thermoswitch or could be the sail switch is hung up. It's not sensing the flame so it's shutting down and starting again. 3 times and it's done.


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corvettekent

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Posted: 09/12/17 06:46pm Link  |  Quote  |  Print  |  Notify Moderator

It could be low battery voltage.


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Sea Dog

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Posted: 09/12/17 06:47pm Link  |  Quote  |  Print  |  Notify Moderator

Long shot.
I had this problem,
the service guy found a small knat (bug)
in the orifice.
He said this is very common!


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newman fulltimer

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Posted: 09/12/17 07:32pm Link  |  Quote  |  Print  |  Notify Moderator

bad propane regulator

SidecarFlip

Deerfield, Michigan

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Posted: 09/12/17 07:38pm Link  |  Quote  |  Print  |  Notify Moderator

Mr. Biscuit will be along and diagnose your issue and tell you the proper procedure to fix it.

wkamper

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Posted: 09/12/17 08:40pm Link  |  Quote  |  Print  |  Notify Moderator

Check the connection at the ignitor. It can be good enough to create a spark but, will not be good enough to send the return signal that there is a flame. I experienced this on our furnace at one time and also later on our water heater. Cleaned the connections and working fine since.

Old-Biscuit

Verde Valley

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Posted: 09/12/17 08:56pm Link  |  Quote  |  Print  |  Notify Moderator

SidecarFlip wrote:

Mr. Biscuit will be along and diagnose your issue and tell you the proper procedure to fix it.


'wkamper' done hit it on the head.

Circuit board not seeing the flame lit miliamp signal so it drops the DC to gas valve. 3X then 'locks out'


Is it time for your medication or mine?


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rrupert

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Posted: 09/13/17 06:44am Link  |  Quote  |  Print  |  Notify Moderator

I just had a similar problem, the flame would ignite sporadically or I got the timeout with the ignition problem code. I could hear the ignitor sparking, the voltage was good, but I found the gas regulator was going bad and was not allowing enough pressure. I switched the regulator and all started working fine. I believe the oil that comes from the LP tanks deteriorates the diaphragm over time.


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Pauljdav

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Posted: 09/13/17 07:39am Link  |  Quote  |  Print  |  Notify Moderator

Need to replace the main board with a dinosaur fans 50 plus pins. All three of my rv s needed this upgrade.

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