Furnace Control Board Fuse Keeps Blowing

The 5a fuse that is blowing is a control fuse for the 24v control side of the system.

Furnace control board fuse keeps blowing.

Fuses come in many shapes sizes and configurations. The wrong type of fuse was installed. When it comes to an air conditioner that keeps blowing a fuse in the circuit board it is necessary that you let a trained technician check it out. A working furnace naturally causes vibrations that can loosen internal wires.

Many look similar but actually have very different functions. If a wire becomes loose it can cause a short. Fuse in furnace circuit board keep blowing. Worn and or faulty parts.

I am still popping fuses and reading over 24 volts. To help keep your furnace wires tight be sure to have your furnace system regularly inspected and tuned up by pronto. Monitor it and if it keeps tripping call an electrician to check. Here s how to diagnose a low voltage short.

Blowing low voltage fuse breaker trip control wiring troubleshooting i ve got a 5 amp fuse that keeps popping on a circuit board. 06 03 2013 08 35 pm 14. I was blowing the 5 amp fuse on the control board for my forced air gas furnace. Problems will arise due to basic wear and tear and also due to things not in your control.

When your furnace keeps blowing a fuse you need to take action quickly. My ruud furnace achiever 90 plus keeps blowing the 3 amp fuse on the ifc circuit board. Regularly tripping the fuse can be a fire risk because it indicates an electrical problem. The voltage out of the transformer reads 26 3 volts.

If the fuse keeps popping in your air conditioner you have a 24 volt short. Rses certificate member rses swra past president the planet is fine the people are. Now read more. I removed all the wires going to my thermostat and it would not blow the fuse when powered on.

If you or someone else installed the wrong fuse in a fuse panel and there has been no personal harm or property. I turned off the input power and attached terminal r 24 vac power to thermostat and the fuse blew. Replacing the fuse or resetting the breaker can temporarily fix the problem but if the underlying issue is not fixed the fuse will just blow again. At such times the best you can do is be attentive towards even the smallest untoward sound that your ac makes.

Ac went down replaced said fuse and unit worked again for a few days then the fuse failed again.