Goes From Cool To Hot - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 07-23-2012, 11:57 PM   #1
Newbie
 
Join Date: Jul 2012
Posts: 6
Rewards Points: 10
Default

Goes from cool to hot


I have a trane unit model #BWD748A100A0 a tech replaced the thermostat (thermostat keep burning out approx two so far) and the unit on the air handler where the wires from the thermostat attach been replace and the orginal problem it goes from hot to cool,shut the Unit down and back on to cool .Is there an control panel on the outside unit (Evaporator)? could the problem be in the wiring?

Advertisement

Bill Texas is offline   Reply With Quote
Old 07-24-2012, 12:16 AM   #2
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000
Default

Goes from cool to hot


is there a wire connected to the C terminal on that subbase for the stat?the outside part "condenser" should be a pair going out from the air handler if it isn't a heat pump.burning up stats and boards is a major install problem...is the stat set in auto if so only run it in cool system and fan auto see if that locks the heat out....if your still geting heat still needs to be looked at...what is the heating setting on that stat anyway?

Advertisement

biggles is offline   Reply With Quote
Old 07-24-2012, 06:27 AM   #3
Member
 
Join Date: Jun 2012
Location: Augusta, GA
Posts: 369
Rewards Points: 250
Default

Goes from cool to hot


That's a heat pump, so you'll have more than two wires. It's entirely possible that you've got a wiring mixup causing the reversing valve to activate/deactivate at times, which would cycle you between heat and cool.

There is a defrost control system in that unit, but I'm not sure if it's mechanical or electronic. If it's electronic then you could certainly have issues with it, which could cause the same issue.

Sounds like you need to find a tech who will troubleshoot the entire system, and not just swap stats.
scottmcd9999 is offline   Reply With Quote
Old 07-24-2012, 05:12 PM   #4
Newbie
 
Join Date: Jul 2012
Posts: 6
Rewards Points: 10
Default

Goes from cool to hot


when on the outside at the unit the compressor start making a noise and shut down the fan continue to run , inside of the house warm air and a few mins later the compressor came back on and start to cooling .
Bill Texas is offline   Reply With Quote
Reply


Thread Tools
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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Upstairs Won't Cool Well theparamount HVAC 14 06-13-2012 06:53 PM
High rise A/C problem: no cool air bookmark HVAC 3 06-10-2012 10:56 PM
Pool deck cool deck chalking hammmer13 Building & Construction 5 12-01-2011 09:32 PM
Want to waterproof foundation around cool room humberguy General DIY Discussions 2 04-04-2010 07:21 PM
Water from cold water faucet goes from cool to hot to cool tima2381 Plumbing 6 05-22-2007 09:02 AM




Top of Page | View New Posts