Question about Heating & Cooling
I have a honeywell t8400c 1024 (2), as shown in the picture attached. When I click the thingy mabob over to air, press the down arrow until I reach my desired degree, the snow flake & a little arrow pointing to "set" begin to blink. I've tried everything! How do I set it? The thing outside doesn't come on, there's no air coming from anywhere, nothing. Help!!
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Posted on Jan 02, 2017
I am not an a/c expert but mine did this one time and it was the transformer I think it is called pull the panel off and look for wires burnt at connections also. BE sure you cut power off before doing this
Posted on Aug 25, 2008
On the thermostat if its a manual on then pop the cover off and look for a small dial with numbers on it. Take and move it tpoi a higher number than whats it is set at. Its called a heat anticipater and is supppose to make it so that the unit does not oveshoot or under shoot like what your experiencing. If its a digital oine then you are going to have to configure the setting in the insdtallers menu.
Posted on Dec 21, 2008
One of two things you can try. Do you own a volt ohm meter? Anytime your unit cycles short like it is doing the control circuit which on this one is 24 volts that engages relays and controls the gas valve to open and close. I am thinking the heat exchanger is getting so hot it is tripping the upper limit which for the most part is around 180 degrees. So next time it turns off take your ohm meter and with the power to the whole unit off. Either turn the breaker off or there is a light switch that is real close to unit turn it off. Undo the two wires to the gas valve and ohm them out. You should have continuity if you get nothing check each limit switch should have a couple. Undo wires to them and check. If you find one that is open more then likely the upper one. They are a safety device that keeps the unit from getting too hot.
There might be another option increase the speed of your fan motor to get the heat out of furnace quicker. Look at the circuit board notice the fan wiring going to it. The Red wire from fan is low speed look to see if it is on HEAT on the board. You should have 4 speeds to pick from you could take the black off of COOL and swap wires and test the unit by doing that. I'm going to put a solution on this so I can come back to it quicker. Even though we a just testing it for now. ken
Posted on Dec 21, 2008
What you are telling us is called shortcyling is caused by possable low refrigerant then the electrical overload is stopping the compressor. overheating can accure.it is best a local serviceman can check it to prevent major part damage.pressure and oil safey controls can cause
simular cylcling problems.
Posted on May 02, 2009
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