For the past two nights I have found my furnace blowing cold.? A couple times I was able to turn it off at the thermostat and turn it back on, and it would heat.? Then I'd wake up hours later to no heat.? One thing the manual says is to try about three times and then go for service.?
I followed the maintenance instructions and took off a couple doors and cleaned the burn area.? The burn door gasket disintegrated, so that has to be replaced.? I see the igniter in there and wonder if that needs to be replaced.? I read the info on the suburbanmfg.com website, which says:
_______________________________
Question 11
My furnace runs, but it's just blowing cold air. What's wrong?
Answer:
Your furnace is in lock-out or the limit switch has opened and not reset. Lock-out occurs when a problem exists during the trial for ignition. Your dealer or a Suburban service center should be consulted to diagnose this condition.
_______________________________
I found the lockout switch in the schematics in the manual.? Think I should try to reset it, assuming I can get a replacement gasket?
I can't light the thing to check the flame; although, I now know where the little window is to do that.? Another thing I discovered was that the long tube (burner assembly) inside the burn chamber (cabinet)? is worn on only about 1/2 of the tube.? It's just a roughness instead of the smooth metal of the unburned half.? It looks like the flames don't even get down to the second half.? This may be a low setting because my RV is so small.? Everything else was relatively clean and new looking.? The cabinet had a thin coat of rust dust that I wiped off and one miniscule carbon chip on the floor.? There is no soot at the exhaust outside the coach.
The furnace has run fine for 3 years; although, I've really been using it only two of the last 3 years.? I used a portable heater the first year I had this RV.? It was quieter.
I wonder if I should try to replace the igniter.? The corrosion on the burner assembly was similar to the igniter.? Just a roughness to the metal.? No rust, ashes, carbon, discoloration.
I have the NT-16S furnace.?
--pat
Addendum: Stove works fine. There is LPG. Both the onboard and auxiliary tanks have plenty. 120 and 12v power seems to be working ok.
I followed the maintenance instructions and took off a couple doors and cleaned the burn area.? The burn door gasket disintegrated, so that has to be replaced.? I see the igniter in there and wonder if that needs to be replaced.? I read the info on the suburbanmfg.com website, which says:
_______________________________
Question 11
My furnace runs, but it's just blowing cold air. What's wrong?
Answer:
Your furnace is in lock-out or the limit switch has opened and not reset. Lock-out occurs when a problem exists during the trial for ignition. Your dealer or a Suburban service center should be consulted to diagnose this condition.
_______________________________
I found the lockout switch in the schematics in the manual.? Think I should try to reset it, assuming I can get a replacement gasket?
I can't light the thing to check the flame; although, I now know where the little window is to do that.? Another thing I discovered was that the long tube (burner assembly) inside the burn chamber (cabinet)? is worn on only about 1/2 of the tube.? It's just a roughness instead of the smooth metal of the unburned half.? It looks like the flames don't even get down to the second half.? This may be a low setting because my RV is so small.? Everything else was relatively clean and new looking.? The cabinet had a thin coat of rust dust that I wiped off and one miniscule carbon chip on the floor.? There is no soot at the exhaust outside the coach.
The furnace has run fine for 3 years; although, I've really been using it only two of the last 3 years.? I used a portable heater the first year I had this RV.? It was quieter.
I wonder if I should try to replace the igniter.? The corrosion on the burner assembly was similar to the igniter.? Just a roughness to the metal.? No rust, ashes, carbon, discoloration.
I have the NT-16S furnace.?
--pat
Addendum: Stove works fine. There is LPG. Both the onboard and auxiliary tanks have plenty. 120 and 12v power seems to be working ok.