Trane heat pump 24VAC fuse blowing

ef...@yahoo.com

unread,

Mar 22, 2003, 6:18:41 PM3/22/03

to

My Trane heat pump is blowing the 24VAC fuse. The original
transformer failed and I replaced it with a new one of the same
rating, 75VA. Now I can turn the house fan on, but as soon as I
switch to cool, the fuse blows and the fan stops.

I have opened the 24V power at the condensor and the fuse still
blows.

Any ideas?

Speedy Jim

unread,

Mar 22, 2003, 6:34:46 PM3/22/03

to

ef...@yahoo.com wrote:

Short in the cable going out to the condensor?
Maybe a staple thru it. Got an Ohmmeter?
Jim

John

unread,

Mar 22, 2003, 6:58:18 PM3/22/03

to

On Sat, 22 Mar 2003 23:18:41 GMT, ef...@yahoo.com wrote:

Have you replaced the T-stat latley? Last one I saw doing this was
because customer tried to install new t-stat and wired it wrong.

joeschmoe

unread,

Mar 23, 2003, 8:00:53 AM3/23/03

to

ef...@yahoo.com wrote:

why did the original transformer fail?
did you determine why . or just replace it ?>

CBHvac

unread,

Mar 25, 2003, 11:23:22 AM3/25/03

to

IF you are talking about the .5amp fuse on the ICB in the air handler, then
you have a short, either:
In the Y-C lines, or you have replaced the thermostat and wired it wrong, or
the boards fried.

If you dont know how to troubleshoot this, and dont want to pay for parts
that are as yet not fried, call your local Trane dealer, or some other
compay that you trust to find this issue for you.

There is NO WAY anyone can diagnose this for you over the net.

<ef...@yahoo.com> wrote in message
news:4lrp7vgu5ac1t1amc...@4ax.com...

TURTLE

unread,

Mar 26, 2003, 1:10:02 PM3/26/03

to

<ef...@yahoo.com> wrote in message
news:4lrp7vgu5ac1t1amc...@4ax.com...

Like John had said I too , the last trouble like this I had was the
thermostat shorting out in the common to the red hot wire. It will blow the
fuses only at times at first than all the time later. Pull the top cover of
the thermostat and you will see a tag middle ways with the number on it of :
WX28X100 . Not the Gemline number replacement number will be TH-105 , or you
can use the Trane number of WX28X100.

TURTLE

unread,

Mar 27, 2003, 2:04:34 AM3/27/03

to

"TURTLE" <tur...@worldnetla.net> wrote in message news:...

>
<ef...@yahoo.com> wrote in message
> news:4lrp7vgu5ac1t1amc...@4ax.com...
> My Trane heat pump is blowing the 24VAC fuse. The original
> transformer failed and I replaced it with a new one of the same
> rating, 75VA. Now I can turn the house fan on, but as soon as I
> switch to cool, the fuse blows and the fan stops.
>
> I have opened the 24V power at the condensor and the fuse still
> blows.
>
> Any ideas?

Like John had said I too , the last trouble like this I had was the
thermostat shorting out in the common to the red hot wire. It will blow the
fuses only at times at first than all the time later. Pull the top cover of
the thermostat and you will see a tag middle ways with the number on it of
:

WX28X100 . Now the Gemline number replacement number will be TH-105 , or