Why does my furnace keep shutting off after a few minutes?
If your furnace turns off after a few minutes, there is a good chance it is caused by a faulty or dirty flame sensor. This vital component is designed to keep an eye on the gas burner. When it cannot sense that burner, the furnace runs then shuts off and starts again.
What would cause a furnace to keep shutting off?
If your furnace keeps shutting off, it could be due to low airflow. There are several indirect issues that cause low airflow. Dirty Air Filters. If you don’t change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it to overheat.
Why won’t my furnace stay on in my RV?
The reasons why your RV furnace won’t stay on is because your battery bank is running low, or you have low propane pressure, or just a bad control board. There could be other reasons, but these are the three most common reasons.
Why does my furnace turns off before reaching temperature?
A malfunctioning, blocked or dirty flame sensor could be the issue. Luckily, this is easily resolved by maintaining a regular furnace maintenance schedule to ensure your flame sensor stays free of dust and debris. A lack of airflow can cause your furnace to stop heating before reaching the set temperature.
Can thermostat cause furnace to short cycle?
If your thermostat is installed near a heat generating appliance such as an oven, it will sense an incorrect temperature and cause the furnace to shut off prior to the end of the heating cycle.
Why does my furnace only run for a few seconds?
A common reason a furnace short cycles is because the heat exchanger, the part that heats your air, is getting too hot due to a lack of airflow. Once the heat exchanger overheats, it trips the high limit switch, which shuts the furnace down to protect it.
How do I test my RV furnace thermostat?
Troubleshooting Your RVs Thermostat
- Step 1 – Ensure You Have the Thermostat on the Correct Setting. …
- Step 2 – Turn the Thermostat Down or Up 5-Degrees. …
- Step 3 – Check and Replace the Thermostats Batteries. …
- Step 4 – Air Blast the Thermostat. …
- Step 5 – Test Connections and Wires.
Where is the flame sensor on an RV furnace?
A furnace flame sensor is a very basic part of your furnace. It’s located on the burner assembly and is just a thin metallic rod. It’s usually bent, and it sits just in front of the pilot flame inside the furnace.
Why is my furnace in my camper blowing cold air?
This is a very common issue with RV furnaces not fully igniting, and as a result, just blowing cold air. … This switch can become blocked with pet fur, dust, and debris from the RV sitting, or from being collected and blown around by the fan itself.
Does a furnace shut off before reaching temperature?
Most furnaces will turn on and run for several minutes before reaching the desired temperature and shutting back down. This can happen anywhere from three to eight times an hour, depending on the condition of the furnace and the outdoor temperatures.
Why does my furnace turn off after 15 minutes?
Short-cycling is when a heater doesn’t complete its regular heating cycle and turns off early. A full heating cycle for a furnace or heat pump is usually around 15 minutes or more. If your heater keeps turning off after only five minutes, that’s too short—no matter how low you’ve set the thermostat.