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softballjunky's avatar
softballjunky
Explorer
Jan 15, 2020

Suburban furnace issue

Hi all, I tried searching for my particular issue but couldn't see a post exactly like mine. 12 year old suburban furnace in travel trailer that will turn on and blow hot for about 5 minutes and then shut off before getting to set temp. I cannot get it to turn back on for a while, then after about 30 minutes it will run for a few minutes then shut off again. Where should I start? Any ideas would be great. Thanks in advance.
  • CavemanCharlie's avatar
    CavemanCharlie
    Explorer III
    Jan 15, 2020
    Wasps love building nests in the intake and exhaust ducts of these furnaces. I once removed a furnace and dumped a whole coffee can full of wasps nests out of it. Try looking down your intake and despicably the exhaust duct for nests and clean them out if you see any. It might be enough. If not you may have to remove the furnace to clean it.
  • opnspaces's avatar
    opnspaces
    Navigator II
    Jan 15, 2020
    Probably heat related. BryantRV has service manuals online for download. Just scroll down to the furnace section
    Link
  • rrupert's avatar
    rrupert
    Explorer
    Jan 15, 2020
    garyemunson wrote:
    I'd suspect the high temp limit switch is failing and opening at too low a temperature.


    2X that, or you may have an obstruction in a heat duct or a closed register.
  • garyemunson's avatar
    garyemunson
    Explorer II
    Jan 15, 2020
    I'd suspect the high temp limit switch is failing and opening at too low a temperature.

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