Same TT in my other thread "Fridge efficiency advise"At night, I turn the gas on and light the pilot. It stays lit. I set the tstat, when it calls for heat it blows hot air. All is well. Wake up the next morning (every night) and its cold in trailer and pilot has flamed out. Why?Thanks in advance!

Usually Bad gas valve, but tighten the Thermocoupler mount on the gas valve first. Should be 5/16 wrench nut. Hopefully you do not have a Coleman furnace. If so, there are no parts and have been no parts for almost 30 years. Doug

Built in energy conserving device?Seriously, how big is the pilot flame? Is the thermocouple positioned with the tip centered in the flame? Just guessing, it's colder at night, if right on the edge of keeping it lit in the evening maybe you go over the edge when temps drop. Or maybe the thermocouple is going.

Needs basic maintenance/cleaning. When was the last time it was done?BTW, I have no intention of looking through your past posts to see what RV you have. Create a signature line or type it into your posts.

1979 Prowler 23'Coleman Presidential II furnaceBought the trailer last spring. No idea the last time it was cleaned.

Furnace Pilot Light Burns Out overnight | Good Sam Community

Ron3rd
Explorer III
Jan 27, 2015
wareagle30 wrote:
No, it most definitely has a pilot light.

I haven't had the time to dive in and clean/replace stuff yet. I'll try cleaning the pilot and replace the thermocouple while I'm in there.

Wow! How old is your furnace? My old trailer, now 12 yrs old, had an igniter.
DrewE
Explorer II
Jan 28, 2015
Ron3rd wrote:

Wow! How old is your furnace? My old trailer, now 12 yrs old, had an igniter.

I believe his 1979 Prowler 23' would be about 35 or 36 years old. ;)

It does look like replacement thermocouples and pilot burner spuds are available from here and possibly other places, if that proves necessary...and at semi-affordable prices, shockingly enough.
wa8yxm
Explorer III
Jan 28, 2015
Flame should always be blue, Orange indicates a bad gas/air ratio or contaminates in the burner area. (either one will do it).

If there is an adjustment for the pilot you can increase the size a bit and/or clean it.

A common problem that bugs many is.... Well, a Bug, of the insect variety, it nests in the gas tube and clogs the gas jet giving you a poor flame.

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Furnace Pilot Light Burns Out overnight

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