DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > No power to my thermostat

LinkBack Thread Tools Search this Thread Display Modes
Old 05-31-2013, 09:29 PM  
Junior Member
Join Date: Jan 2013
Posts: 27
Liked 9 Times on 7 Posts
Likes Given: 6


Those darn condensate pumps and their safety features! Usually don't see this issue unless furnace/air handler is installed in an attic or upstairs area. But good post about what could be a possibly overlooked cause of the problem.

keepinitcool is offline  
Reply With Quote Quick reply to this message
Old 09-02-2013, 09:40 AM  
Junior Member
Join Date: Sep 2013
Posts: 1
Likes Given: 1



Thank you! Thank you! Thank you! My Labor day weekend hell is finally over. I just did not expect that a float switch would also kill power to the thermostat, but not kill power to the wiring that controls the fan. I don't even want to admit everything I've done to troubleshoot and how many internet posts I've read. After reading your post I went out and looked at the float line. Sure enough it wasn't level. Got it level and now reading 28 volts between R & G at the thermostat. Yeah!!!!!!!


Also for anyone else troubleshooting a similar problem, voltage would fluctuate between R & C at the thermostat. The float would never totally kill the voltage but would keep it low enough to not power the thermostat. A couple times voltage was high enough to power everything, but it would soon fail again. I'm sure due to water again tripping the switch.


Last edited by mcluvin; 09-02-2013 at 10:05 AM.
mcluvin is offline  
Reply With Quote Quick reply to this message

Quick Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Thermostat or furnace problem? dakuda HVAC 8 01-02-2010 03:05 PM
Electric Heat Pump & Programmable Thermostat John Greeb HVAC 2 01-09-2009 09:01 PM
Thermostat Installation jeff7 HVAC 3 01-22-2007 09:31 AM
Having trouble wiring thermostat swinny Electrical and Wiring 2 11-29-2006 09:08 PM
One thermostat works, the other doesn't churley702 HVAC 1 11-22-2006 08:27 AM