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-   -   T-Stat trouble (http://www.diychatroom.com/f17/t-stat-trouble-32103/)

Rickl 11-18-2008 08:12 AM

T-Stat trouble
 
Hi Everyone,

We have a heat pump/air handler system in our condo. Our probelm is when we set the T-Stat at 68 the fan is not going off when it reaches temp. It will stay on forever (we tested it). The Heat pump will shut down, but the fan remains on.

Now the wierd part. If we manually reset the temp on the T-Stat to 65, the fan will go off as long as the temp is above 65.

Is the T-Stats temp sensor going? I think the fan relay is working and the heat pump and fan seem to work as well.

Should I replace the T-Stat?

hvaclover 11-18-2008 09:12 AM

What kind of stat is it? Do you have a programmable "Fan ON" cycle in your existing stat.? Did you make sure your fan-auto switch is in the auto position.?

Rickl 11-18-2008 11:48 AM

Hi,

It is a RiteTemp 8010. It is not programable and the fan is on Auto.

dac122 11-18-2008 12:46 PM

Carefully pull the cover off and see if you have 24VAC across the G and C terminals when this happens. If so, it might indicate the tstat is bad. Then see if your volts go to 0 when you reset the temp to 65.

Let us know what you find.

hvaclover 11-18-2008 02:00 PM

Quote:

Originally Posted by dac122 (Post 186850)
Carefully pull the cover off and see if you have 24VAC across the G and C terminals when this happens. If so, it might indicate the tstat is bad. Then see if your volts go to 0 when you reset the temp to 65.

Let us know what you find.


Hey dec, you ever consider maybe the site should offer loaner meters? LOL:laughing:

kennzz05 11-18-2008 03:41 PM

check what terminals the wires are going to at the tstat make sure y is going to the Y terminal and not W or E or aux

dac122 11-18-2008 03:53 PM

Quote:

Originally Posted by hvaclover (Post 186883)
Hey dec, you ever consider maybe the site should offer loaner meters? LOL:laughing:

:thumbsup:

dac122 11-18-2008 03:57 PM

Quote:

Originally Posted by kennzz05 (Post 186937)
check what terminals the wires are going to at the tstat make sure y is going to the Y terminal and not W or E or aux

Interesting thought...

Rickl, did it ever work correctly, or is this something new?


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