T7300 stuck in heat - http://www.hvacmechanic.com/ Forums


Original message

garrison

67.34.107.115

"T7300 stuck in heat" , posted Fri 12 Jan 07:18user profileedit/delete messagepost reply


We have an old version (light brown) Honeywell T7300 t-stat on a Q7300A (non switching subbase) that will not come out of heat. We replaced both the subbase and the stat and are having the same problem. This sounds familliar to me but I can't remember what we did last time to resolve the problem. Any Ideas?

Bob Garrison
Garrison Mechanical
South Florida
954-441-7000

 


Replies:

kdmman

24.64.223.203

"Re(1):T7300 stuck in heat" , posted Sat 3 Feb 02:34user profileedit/delete messagepost reply


remove w1 from stat if you still have 24v @ unit you have a short between r+w1,then diconnect w1 wire on unit if you still have 24v on w1 there is short in wire

 

Dog Biscuit

207.200.116.67

"Re(1):T7300 stuck in heat" , posted Tue 16 Jan 02:22user profileedit/delete messagepost reply


Work each end of the thermostat wire and check for open or ground
or short circuit using your ohmeter. Do you remember doing any remodeling that could have damaged the wires.

To err is human to repair divine