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Why is my propane furnace short cycling?

By David Perry |

Why is my propane furnace short cycling?

Another common cause of a short cycling furnace is that the furnace itself is overheating and it’s turning itself off to prevent damage. This causes the hot air in the furnace to become trapped. Restricted airflow is often the result of interior vents being blocked, a blocked exhaust vent, or a dirty air filter.

Why is my furnace short circuiting?

Causes of Short Cycling The more common cause of furnace short cycling, though, is heat becoming trapped in the system. This often happens either as the result of a malfunctioning air handler or clogged air filter. No air flow into the furnace means the system has no way to pump heat out of the main body.

How to troubleshoot a propane heater in an RV?

RV Propane Heater Troubleshooting: 3 Common Issues that Occur in RV Propane Furnaces, and What May Be the Cause: If you’re experiencing issues with your RV propane furnace, this section will help you determine what the problem is and how to solve it. Before you attempt to fix any issues, there are 3 things you should do:

What do I need to know about my propane heater?

Check the polarity and make sure the unit has a good ground. If setup for Propane, the inlet gas pressure switch my be open. Ensure inlet pressure is set per the rating plate. If pressure is good change the switch. Gas pressure must be set according to the rating plate. Heater must have a good ground for proper ignition and flame sensor operation.

Why is my propane heater not blowing hot air?

RV furnaces typically take 15-30 seconds to start blowing warm air, so if you wait that amount of time and there is still only cold air being blown, then there’s probably an issue with the sail switch. There’s usually 2 main culprits for your sail witch preventing hot air from blowing: low battery voltage or dirty sail switch.

What to do if your boiler is short cycling?

Well, the first piece of advice we can give is that if you think that your boiler is short cycling due to closed vents is to make sure that the vents are all open or able to open properly. If you have checked to be sure that your vents are working properly then we would advise you to contact us to investigate further.