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-   -   Trane XL1200 inside blower won't work (http://www.houserepairtalk.com/f8/trane-xl1200-inside-blower-wont-work-11921/)

John1 08-10-2011 10:56 AM

Trane XL1200 inside blower won't work
 
My blower on my furnace (Trane XE90) won't come on when the A/C (Trane XL1200) is on. If I turn the A/C off and put the fan to manual, the fan comes on with no problem. The condencer on the A/C unit will run, but not the inside fan on the furnace. Do I need to replace the board? Need help

kok328 08-10-2011 05:23 PM

Possibly a problem with the thermostat.
As far as I know, the thermostat will send a signal for fan through the same relay on the board when switched to fan "on" versus fan "auto".

paul52446m 08-10-2011 06:41 PM

Quote:

Originally Posted by John1 (Post 59788)
My blower on my furnace (Trane XE90) won't come on when the A/C (Trane XL1200) is on. If I turn the A/C off and put the fan to manual, the fan comes on with no problem. The condencer on the A/C unit will run, but not the inside fan on the furnace. Do I need to replace the board? Need help

Most of the electronic boards today, The green post is for manual fan runs the fan on a low speed like the heating speed. When you turn on cooling, the power comes back to the y post which goes to the condenser and also to a different relay that starts the blower on a faster speed. So i would say you have a bad board. Paul

John1 08-11-2011 04:46 AM

I went and bought a new one and replaced it, but that wasn't the answer. Same issues,
thanks for suggesting

John1 08-11-2011 05:08 AM

Quote:

Originally Posted by kok328 (Post 59803)
Possibly a problem with the thermostat.
As far as I know, the thermostat will send a signal for fan through the same relay on the board when switched to fan "on" versus fan "auto".

Paul, Thanks for the insight. How much of a problem is it to change the board? It is the UNIVERSAL HOT SURFACE IGNITION CONTROL MODULE (50A55-843) that needs to be replaced.

paul52446m 08-11-2011 06:37 AM

Quote:

Originally Posted by John1 (Post 59836)
Paul, Thanks for the insight. How much of a problem is it to change the board? It is the UNIVERSAL HOT SURFACE IGNITION CONTROL MODULE (50A55-843) that needs to be replaced.

If you can let the board hang on the wires and then put the new board on furnace , then install one wire at a time. If you get those wires crossed you will have a real problem. Paul

paul52446m 08-11-2011 06:42 AM

Quote:

Originally Posted by John1 (Post 59836)
Paul, Thanks for the insight. How much of a problem is it to change the board? It is the UNIVERSAL HOT SURFACE IGNITION CONTROL MODULE (50A55-843) that needs to be replaced.

Can you send me some pic. of your controls.
paulm989@hotmail.com Paul


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