Furnace Short-Cycling
2018 Furnace - Atwood/Dometic model AFSD20141 is short-cycling. I tried the following everything: Jumped the thermostat jumped the high temp limit switch jumped the sail switch removed disch...
Forum Discussion
agiannetti wrote:
Also, to answer your question, system NEVER shuts down, just short-cycles.
Regarding that restrictor inside the exhaust vent tube, which decreases the inside dimension of the tube to about 1/2" diameter, do you know it's purpose? When it's removed, no more short-cycling. Can I just remove that restrictor permanently?
To my mind a constant short cycle is indicative of the high-limit sensor kicking in, it hits high temp, shuts down, cools off and repeats.
You need to check first the obvious things like restrictions on air flow inside the rig’s distribution system, that would keep too much heat in the furnace itself. Even a blower turning slower than spec. would do the same thing.
