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cooldragonshome 03-14-2006 01:22 PM

a very odd problem with central air conditioner
this started happening at the end of last summer, i am not sure which a/c i have, but i have a carrier furnace system and a manual thermostat.

the problem is everytime i set the thermostat to cool it the furnace board fuse will burn out. i have no problems with switching to off or heat.

and the fuse doesnt take a while to burn, it burns instantly. i am thinking it would be electrical, but since i dont know anything about wiring and which wire is for a/c, i am not able to tell if the wiring is loose or cut.

if any further information is required please let me know.

allan 03-16-2006 05:16 AM

air conditioning blowing fuses
You problem lies in a short in the cooling section of your wiring.
Remove your thermostat and make sure you do not have any wires touching on the ac side of the thermostat.

The cooling wire usually will be black or yellow ,Dependending.

Also make sure that it is not shorting out in the wall.

You will have to ohm out the wires

Allan Thorne
Clarkson Comfort Zone Heating and Air Conditioning Mississauga Ontario

Aceinstaller 03-18-2006 01:47 PM

call a service tech. there are way too many things to list. bad ground, improper wiring, bad board, squirrel chewing wires outside, etc.....)

WyrTwister 06-14-2015 05:30 PM

You may also have a short anywhere from the tstat to the furnace to the condenser unit ( outside ) to inside the condenser .

Just a stab in the dark , but go outside and see if the tstat wire from the furnace to the condenser , is exposed . If it is , did it get chewed in tow by a pet or a weed eater ?

God bless

ben's plumbing 06-14-2015 05:56 PM

disconnect the wire from the y terminal and c terminal on control board ..set t stat to cool see if it still blows fuse .. if fuse don't blow... problem is in control wire to condenser or contactor....

yuri 06-14-2015 05:59 PM

2006 was a good year for rodents chewing wires.:yes:

ben's plumbing 06-14-2015 06:03 PM


Originally Posted by yuri (Post 2159002)
2006 was a good year for rodents chewing wires.:yes:

yep don't you just feel like a jack ass when that happens:yes:

nap 06-14-2015 06:06 PM

Wyr twister

This is at least 2 ancient threads you have revived. Having some issues somewhere in life that cause you to not realize the dates when the threads were started?

WyrTwister 06-14-2015 06:06 PM

Would make me feel like getting a cat . A hungry one .

God bless

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