So, things are going great with out "new RV". We've done some interior remodeling, repaired the brakes, fixed up the exhaust and gone camping a few times. Last week we had the propane system checked (a-ok was the verdict) and have since started using the stove, but I haven't yet figured out how to work this furnance. Can anyone help me? I know that if I turn the thermostat up, the fan will start, but I cant figure out how to get it to make hot fire :) All I know is that it is a suburban furnace, and the motorhome is a 1978 country squire class C. I'm hoping that by posting a picture, one of you will recognize the unit and be able to offer some advice (how to light the pilot would be a great start, assuming it has one?)
Thanks in advance for your help!
yes it is a suburban but not the original furnace for that rv for sure.
so try this system....turn thermostat all the way up...fan should come on in 10-30 seconds, after the fan has run for 10-30 seconds you should here a click which is the gas valve, and then after that another click if it is loud enough which is the igniter lighting the fuel. once it lights, you can go outside and check the exhaust for heat. if fan runs and furnace does not light retry a few times to clear any air out of the propane line.
one thing to note tho for the future it pays to buy some screen or a vent cover to keep muduabers out of the vent lines outside, they just love to plug them up which in turn restricts the air from passing through and therefore the furnace will not light.
and thermostats are pretty iffy on older rv's they tend to over heat or wait to long before they come on, so you might find yourself down to 60 or up to 80 when the thermostat is set to 70 sometimes, if so you can get a nice 24volt thermostat which will do the job cheap and more reliable.
I have a coleman on my 1978 nomad trailer. im sure they are somewhat similar being same year. the pilot lights via glow plug. I have to hold the pilot button down similar to the hot water tank, but instead of a match there is a red hot glowing resistor that lights pilot. I have on occasion lit it with a match; just unscrew glass viewing lens and stick match in. Also I've found that there is a lot of air in the propane system when you change bottles, so i light the burners on my stove to help purge most air from the system prior to lighting furnace. Sometimes i have to hold the pilot down for 15-20 sec for pilot to light but once its lit and hot it never goes out..hope this helps oh yea one other thing i remember now with my furnace..it wouldnt light the main burner; heard gas valve clicking but not gas..low voltage to solenoid not allowing valve to open enought to let gas in..fix replace thermostat as contacts were dirty.