DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   HVAC (http://www.diychatroom.com/f17/)
-   -   Low voltage problems!! (http://www.diychatroom.com/f17/low-voltage-problems-109161/)

bkm2570 06-29-2011 11:17 AM

Low voltage problems!!
 
When I hook up the low voltage to my circuit board on my furnace it drops from 24 to 5. I've tryed 2 differant boards and have a new transformer that reads 24 when not hook to the board. If you can help it would be great. Thanks!

beenthere 06-29-2011 05:14 PM

What VA is the new transformer.

Did you try leaving all other low voltage wires off, and seeing what voltage you read.

biggles 06-29-2011 05:37 PM

is the board tagged R and C backwards maybe with nothing connected you should read 24Vs where it connects to the board

hvactech126 06-29-2011 06:56 PM

sounds like a bad stat or another load that is shorted in the low voltage circuit. I've seen contactors in ac units cause this.


All times are GMT -5. The time now is 12:15 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved