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I tried to replace my thermostat with a reprogrammable one and it didn't work. I reinstalled the old thermostat and it will not even read a temp or show any signs of life. Can you help me?

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It makes a difference if you have elect or gas. you have to use a thermostat specific for your application. also it is possible the you burnt out the heat anticipator.

Posted on Sep 11, 2008

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My Dometic thermostat reads -05 degrees on zone 1 for the inside temp.It is at least 80 degrees inside. When it reads -05 it won't let the AC kick on. Any ideas?


Instant thought- bad bateries in the stat! Second thought, bad Stat- sometimes they have intermitant problems, and being soldered PC boards with chips, relays, diodes, resistors, etc. they are not fixable nor tracable on intermitant problems, simply toss it & replace with a new one. The -05 leads me to believe the internal Thermister (electronic temperature sensor) is causing your problem, it sends the chip resitance values based on the temperature it's sensing- if it sends the wrong resistance value to the chip, the chip thinks the temp is different than it really is. Make sense? Hope this helps!

Mar 23, 2013 | Dometic Rooftop RV Air Conditioner

1 Answer

Temp reading goes up instead of down when my 1 year old Haier window AC is turned on


You must call to the company supplier for to claim this problem.
Normally the control thermostat can be defective. Contact customer support they have 24 hours online service.
God bless you

May 09, 2012 | Haier Air Conditioners

2 Answers

Hi I have a Rinnai 1004. I asked a question before about clipping the temp gauge and adding a length of speaker wire in, so that it would get a more accurate 'room' temp reading. The reason for this is...


That sounds quite plausible...and pretty good idea.

If I'm right it sounds like you simply would like to add a glorified "extension cord" to the on-board controls and thermostat to make them usable from a remote location. That could work, can't see why not. It definitely would make for a more accurate temperature reading rather than having the temperature element collecting from a mere few inches of the units' output vents.

If running it more than 30 ft cord length though, you may need to go up in wire gauge or double up on what you have if you don't have larger than about 12-10 gauge.

The only other consideration I can think of is that after you dismantle the control and temperature assembly, that when you reinstall it elsewhere that the temperature element should be oriented in the same position as it was when mounted inside the A/C chassis, i.e.; not tipped or otherwise moved from a horizontal or vertical position.

Nov 11, 2010 | Air Conditioners

2 Answers

Our Carrier Comfort Zone II thermostat, which has 2 zone readouts, currently shows a temperature of 00, as in zero zero, on one zone. That is the main zone for our home. Zone 2, for spare bedrooms, etc....


This .pdf file may be of help to you:
www.brivis.com.au/.../Carrier%20Comfort%20Zone%20II%20Owner's%20Guide.pdf
Perhaps you could get some help from Carrier Support here:
http://www.residential.carrier.com/support/index.shtml
I noticed they have an option of talking to an engineer, and perhaps they could explain how to reset or set the unit.
Hope this helps.

Sep 25, 2010 | Air Conditioners

1 Answer

We have a3 yr old Goodman CAPF3030B6AA Airconditioner and Furnace. The Air conditioner hasnt worked right all summer. Its 102 degrees outside and we can set the thermostat on 72 degrees and it will be...


A/C units have a design temperature of 90F. Now when the temperature is above 90F they start to have trouble keeping up. Depending on how well your unit is sized for the house, you will notice when the temp is over 90F. I don't know if who ever looked at your unit checked the refrigerant pressures since you said he checked the temps but I assume he did, however, it could possibly need charging.

Aug 05, 2010 | Air Conditioners

1 Answer

Wrong temp. on the thermostat.


sometimes a power outage or a static spark will effect the stat, remove the stat from the wall take out the batteries and walk away from it for at least 10 minutes, then reinstall it

Aug 03, 2009 | Air Conditioners

1 Answer

Improper Termperature Readings during AC run


personally i'd just replace the thermostat, but try pulling the front panel off and look on the circuit board and see if there is a jumper for F/C or any other settings. you may try changing its position. you can also remove the batteries for 15 minutes and see if it resets itself. the only other thing it could be is a wiring issue.

May 29, 2009 | Air Conditioners

2 Answers

Problem with mitsubishi air roof units


to tricked the thermostat only a way i know,to put on it an ice cube for a while.propably wrong choice to installed roof unit you must installed to the floor better for the ac and to you

Dec 13, 2008 | Mitsubishi Mr. Slim MXZ30TN Air...

1 Answer

Have a Coleman Evon Furnace, manufactured for Zone 1, in my 1998 Module Home. Have had 4 thermostats put on . Everyone has the same problem. Works fine for first week and then will not read correct temp....


Hang a small thermometer next to the thermostat to see how much it is off by. You did not mention what kind of thermostat you have been installing. Check in the instruction manual to see if it has a heat anticipator. Some thermostats have a small winding (heater) inside it that will anticipate the temperature raise and turn off the heater a few degrees before set poit. If this was not set, this would be your problem. If it is factory set, sometimes they come with a small resistor that must be installed in the wiring to help with the anticipator. If you find that the thermostat is still way off, yes you may need to relocate it. Kitchens can fool thermostats by the heat from the stove and refrigerator. You can either relocate the thermostat by changing the location of the wires and base or install a wireless unit that is easily mounted where you want without running wires.

Aug 18, 2008 | Air Conditioners

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