Water heater/furnace problems

[Guitarman]

Hello I hope someone can help me here, I have a 2002 great west van, Dodge Ram 3500, I have had trouble with my furnace, which now just blows cold air, I just forgot about it after not really needing it, but last night I turned my water heater on for the first time, waited 30 mins, turned my tap on, and it’s just cold water, my question is, is the furnace and water heater connected together? And why are they not giving heat? When I turn furnace on, all works fine, but blows cold air. Is this a fuse, or maybe converter? How can I tell?
Thanks in advance, ive checked my fuses, all seem to be ok

[booster]

Do the frig and stove work on propane and function OK.

[Guitarman]

Yes I can take some photos, what shall I photograph exactly?

[Guitarman]

I’ve never used either of them, fridge I had working plugged into house, stove I’ve never used, it’s lpg.

[Guitarman]

Just seems odd tht both are not working, I just thought they might be connected

[Guitarman]

Make and model of the furnace? Heater?

[Guitarman]

It’s nothing to do with propane, my furnace just normally works off thermostat , no propane, I just turn it on, but as I say, it’s blowing cold air

[GallenH]

Are you saying that there's NO propane in your van. It appears only recent that mfgs are getting away from using propane completely. I don't know your van, though. On my 1997 PleasureWay (not too much older than yours) the heater is LP but the blower is, of course, electric. The only thing that I turn on for mine is the wall thermostat also. What happens is that the blower starts and the air it's putting out pushes open a "fan" switch which opens the gas valve and triggers an electronic module which lights the gas. If neither the fan switch or the module is faulty, you won't get a light/heat....only unheated air from the blower.

[GallenH]

That should have read "If either...."

[rvsprinterguy]

Originally Posted by GallenH

Are you saying that there's NO propane in your van. It appears only recent that mfgs are getting away from using propane completely. I don't know your van, though. On my 1997 PleasureWay (not too much older than yours) the heater is LP but the blower is, of course, electric. The only thing that I turn on for mine is the wall thermostat also. What happens is that the blower starts and the air it's putting out pushes open a "fan" switch which opens the gas valve and triggers an electronic module which lights the gas. If neither the fan switch or the module is faulty, you won't get a light/heat....only unheated air from the blower.

On my RV, I also have to switch on the propane valve, or the furnace never gets gas to ignite. The furnace will continue to blow cold air and the ignitor keeps trying to light the gas that's not being delivered unless the propane valve is switched on.

What brand/model of heater? What brand/model of water heater?

[booster]

Originally Posted by Guitarman

It’s nothing to do with propane, my furnace just normally works off thermostat , no propane, I just turn it on, but as I say, it’s blowing cold air

I don't understand this. A 2002 Great West that has a furnace that doesn't use propane? What fuel is it using, as it is really unlikely that there would be enough electricity to do it. Gasoline or diesel heater? There has to be fuel for the furnace to burn for heat.

[GallenH]

rvsprinterguy: Oops! Yes the main valve has to be on as well and since Guitarman said the only appliance that he has working is the fridge on 120v, that could be a possible....and easily solved....remedy.

[booster]

Originally Posted by GallenH

rvsprinterguy: Oops! Yes the main valve has to be on as well and since Guitarman said the only appliance that he has working is the fridge on 120v, that could be a possible....and easily solved....remedy.

Or the propane tank is empty.

[Guitarman]

No, definitely my furnace works without gas, and the water heater as well, ive never used gas since I bought my van 2 years ago... so why is it blowing cold air,? It was blowing hot, and my water is cold

[BBQ]

Originally Posted by Guitarman

No, definitely my furnace works without gas, and the water heater as well, ive never used gas since I bought my van 2 years ago... so why is it blowing cold air,? It was blowing hot, and my water is cold

Are you plugged in?

[Guitarman]

No, not plugged in, but I remember when I was plugged in, still no hot air, yet when I bought the van it gave hot air without electric

[markopolo]

Originally Posted by Guitarman

Yes I can take some photos, what shall I photograph exactly?

Take a photo of the gauge on the LPG tank. It is possible that you'd have two LPG tanks if the van engine has been converted to run on LPG.

[booster]

The guess has to be that the propane tank was on and full when the van was purchased two years ago. Not using the stove and running the frig on Ac so only occasional heat and water heating could let the tank last two years, but it is now empty.

[Guitarman]

Ohhhh now I think I get it, maybe I bought the van with gas in? And now it’s used, it needs refilling? Now I think I understand, my van uses lpg, but I see there is an inlet for putting gas in it. Shall I try it? Would this also serve to hear the water?

[booster]

Yes it would also be used by the water heater.