Furnace Control Board Fuse Keeps Blowing

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

Furnace control board fuse keeps blowing. I removed all the wires going to my thermostat and it would not blow the fuse when powered on. Many look similar but actually have very different functions. The voltage out of the transformer reads 26 3 volts. Regularly tripping the fuse can be a fire risk because it indicates an electrical problem.

Now read more. 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. If a wire becomes loose it can cause a short. I am still popping fuses and reading over 24 volts.

Monitor it and if it keeps tripping call an electrician to check. Im going to show you how to fix this problem with just a screwdriver and maybe 5 3 amp fuses and we will fix the 3 amp short im just making this video for my. Locating fixing or replacing loose wiring is difficult to do by yourself. If the fuse keeps popping in your air conditioner you have a 24 volt short.

06 03 2013 08 35 pm 14. Problems will arise due to basic wear and tear and also due to things not in your control. I was blowing the 5 amp fuse on the control board for my forced air gas furnace. To help keep your furnace wires tight be sure to have your furnace system regularly inspected and tuned up by pronto.

I turned off the input power and attached terminal r 24 vac power to thermostat and the fuse blew. My ruud furnace achiever 90 plus keeps blowing the 3 amp fuse on the ifc circuit board. Blowing low voltage fuse breaker trip control wiring troubleshooting i ve got a 5 amp fuse that keeps popping on a circuit board. Fuses come in many shapes sizes and configurations.

Rses certificate member rses swra past president the planet is fine the people are. When your furnace keeps blowing a fuse you need to take action quickly. Here s how to diagnose a low voltage short. Worn and or faulty parts.

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. At such times the best you can do is be attentive towards even the smallest untoward sound that your ac makes. If you or someone else installed the wrong fuse in a fuse panel and there has been no personal harm or property. The 5a fuse that is blowing is a control fuse for the 24v control side of the system.

The wrong type of fuse was installed.