Furnace Blows Fuse On Circuit Board

The good news and bad news about electric furnace troubleshooting.

Furnace blows fuse on circuit board.

There could be several reasons why air conditioner keeps blowing fuse in circuit board. First the bad. You need to find the root cause of the blown fuse on the furnace circuit board before you cause damage to the unit. Here s how to diagnose a low voltage short.

Blows the 3 amp fuse on the control board for my goodman ac unit. If that all check out. The furnace requires a lot of electricity to run and your home may not have the means to support it or there could be a short in the system. If the fuse keeps popping in your air conditioner you have a 24 volt short.

It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage. Check out this post. The stat wire feeds up through the bottom access hole. Or just throw parts at it.

Make sure there is not chafed wires. This was done after i couldn t get an appointment soon enough for a. Your furnace s control board has a separate fuse that protects it from getting too hot. Remove the service panel on the goodman unit 5 16 screws where the power comes in.

If someone is poking around your furnace and is not too careful they could more wires so that they come into contact with the furnace s wire frame causing them to short and blow the fuse on the furnace board. If the fuse blows when you have no low voltage wires hooked to the furnace then you have an internal problem like a bad limit gas valve connection or control board. After resetting the circuit breaker and replacing the fuse if the fuse keeps blowing there might be an electrical short in the electrical system that supplies the electricity to the furnace. Furnace blowing cold air.

Is your furnace running but blowing cold air. Diy and save 300 500. So i m working on a sure comfort nat gas furnace. Amperage draw anything near the fuse rating would periodically blow a fuse.

Loose electrical cables there could be loose electrical cables inside the circuit box or somewhere in your ac which could be causing a short circuit. Within a 1 5 secs after i push door switch in the 3 amp fuse blows. Apparently theres been somebody else here already. Sometimes the blown fuse in the furnace comes from a malfunctioning transformer.

Last guy replaced board already. This is one of the most common reasons why the furnace fuse is blown. The coil in the contractor is 24v. I ve removed low voltage wires coming from thermostat and ac unit and i ve removed the 9 pin connector for the 24 volt circuit within the furnace.

Here are a few of the most common problems.