The good news and bad news about electric furnace troubleshooting.
Furnace blows fuse on circuit board.
Here are a few of the most common problems.
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.
Check out this post.
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.
Sometimes the blown fuse in the furnace comes from a malfunctioning transformer.
In this case you should call an electrician.
Within a 1 5 secs after i push door switch in the 3 amp fuse blows.
It isn t the hsi inducer or blower motor as these are all high voltage parts not low voltage.
You need to find the root cause of the blown fuse on the furnace circuit board before you cause damage to the unit.
If the fuse keeps popping in your air conditioner you have a 24 volt short.
First the bad.
Last guy replaced board already.
There could be several reasons why air conditioner keeps blowing fuse in circuit board.
The coil in the contractor is 24v.
This is one of the most common reasons why the furnace fuse is blown.
Furnace blowing cold air.
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.
Diy and save 300 500.
Or just throw parts at it.
Blows the 3 amp fuse on the control board for my goodman ac unit.
Your furnace s control board has a separate fuse that protects it from getting too hot.
The most probable of these are 1.
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.
The contractor may be hanging up or shorting.
Make sure there is not chafed wires.
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.
This was done after i couldn t get an appointment soon enough for a.
If that all check out.
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.
Remove the service panel on the goodman unit 5 16 screws where the power comes in.
Is your furnace running but blowing cold air.
Here s how to diagnose a low voltage short.
Apparently theres been somebody else here already.
