1969 Safari Furnace won't light.

[Protosport]

I can not get my furnace to fire, looks like brand new, I don't think it has ever been used. The fan runs fine but I can not get it to light. I open the gas line, valve push in the valve, press the ignition button, it sparks but no fire.
Is there a orifice that I need to clean or line I should blow out or something?

[purman]

Can you smell gas coming out?

There is a safety switch connected to the fan. If the fan isn't spinning fast enough it won't let gas through.... The switch might be bad...??

[Silverhobby]

If it has been a while since this furnace was used it really needs a good cleaning and inspection by a qualified technician. Issues of carbon monoxide can lead to deadly problems. There can he a deterioration of seals or gaskets that may contribute to the appliance being unuseable. For your safety, have the appliance checked out. My .02 worth

[Mike Leary]

I agree, there are too many things that could be causing this; have it serviced. If it's
a Suburban, the whole unit does not have to come out, only the innards.

[CJ of Okla]

Our heater in our 69 seemed to be working, except it was turning on then off before it heated up. So we changed the thermostat on the wall. That hasn't helped, apparently there is a couple heat sensors on the unit itself. Checking with the manufacture and two RV dealers all they tell us we need to get a new heater. Suburban MFC no longer makes replacement parts for these units and RV dealers don't want to work on them. My husband is looking for a diagram of this unit. Does anyone have a manual on this unit?

Suburban MFC, Daton Tenn
Model NT30A
Code DMB
Input 30,000
Output 24,000
SN# 0008256
DYNA-TRAIL

[VIKING]

My 64 safari had not had the furnace turned on in years, so when i went to start it the same thing was happening, no pilot light. I removed the cap screw that covers the pilot light flame adjustment screw, and opened it while i held a flame to the pilot, and viola! Pilot light works
good luck,
rich

[Chitown AirStreamers]

Well I'm going thru this RIGHT NOW! I do not smell any gas....reasons????

[azflycaster]

It takes some time to push the air out of the propane lines. You can shorten this by lighting a burner on the stove first. There are also valves under the trailer for different appliances. One is for the furnace.

[VIKING]

My '64 does'nt have shut-off valves under the trailer. The problem I had was that the pilot light gas adjustment was cranked all the way down to shut it off. It took me a while to figure out to check it. Luckly I have my owners manual with the furnace manual still in it. If you can't get gas to the pilot after checking the shut offs and pilot adjustments, you should get a professional to go through it. It's not worth the danger of trying to repair it yourself. That's where I'm at with my refer right now. The gas safety switch is not allowing gas to reach the pilot.
Good luck, Rich