3 amp fuse blows every few months,any diea why ?Post created: 2013-01-18 Type of Equipment: Furnace Views: 330
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On 2013-01-18 JB wrote:
I found the following here: http://carson08.hubpages.com/hub/How-to-fix-your-furnace-or-air-conditioner-and-save-the-200-service-charge. It provides a good basic overview of what to look for and what a possible easy fix may be. However, since this is an electrical problem (most likely) then it is highly advised that you call in a certified HVAC tech to diagnose and fix the problem.
That said, the following should help:
"THE 3 AMP FUSE ON THE BOARD
"Here's where it starts to get tricky. This one requires a few steps.
1) Turn the power to the furnace off. Either flip the switch or kill the breaker so you don't get shocked.
2) Take the furnace door off. Depending on the brand there will be between 1 to 3 doors, take them off so you are looking at the electrical section of the furnace, typically in front of the blower door near the bottom of the furnace.
3) Look for a small fuse. It looks like this TT ignore the lines sticking outsideways on the 2 t's and thats what it is, basically a fork thats purple or orange that plugs into the board. It will read 3 or 5 on it.
4) Pull out that fuse if it has one, sometimes its got a reset, sometimes it has nothing, but if it does, pull out that fuse and check it.
5) If the small wire connecting the two sides has popped, go to a hardware store and buy a small box of 3 or 5 amp fuses, replace one and see what happens, if it pops again, you have short somewhere, if you can't see wire rubbing anywhere, call the tech, you have a low voltage problem."
I hope this helps.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.