Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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A/C Problems I am in Florida, and here lately when it gets real hot in the afternoon, my compressor shuts down. Outside unit fan is running, fan inside is running, but compressor wont pump. Carrier system installed in 93. Installed a focuspro 5000 thermostat and had the unit charged and then this started. I just had to install a new contactor switch this week also. Any idea what is going on?

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SOUNDS LIKE THERMOSTAT IS NOT SET UP CORRECTLY THE HAVE TO BE PROGRAMED TO YOU UNIT

Posted on Sep 12, 2008

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How to troubleshoot thermostat wiring?


I'm not sure if the thermostat is wired correctly. First, the thermostat is wired directly to the outdoor unit (compressor/condenser unit). It is NOT directly connected to the indoor unit. It connects to a low voltage control panel in the outdoor unit that sends a signal to your indoor fan/evaporator. This wire is called the fan relay switch and physically runs between the low voltage controls of the indoor and outdoor units. If the fan relay is bad it's possible that the unit runs continuously. To prevent destroying your outdoor unit there is a safety feature that prevents the indoor fan from shutting down while the outdoor unit is running. If the indoor fan did shut down while the outdoor unit was running than you would slug your compressor. That is, your compressor normally sees refrigerant gas but is instead seeing refrigerant liquid. That would not be good since this scenario would destroy your compressor. It sounds like a faulty fan relay. The actual contactor portion of the relay is in the outdoor unit.

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Even though the outside temp is above 35 degrees my unit still runs as if it is on emergency heat because the outside fan does not come on and the house is really hot!


SOunds like we have some control problems--
First explain what you mean by 'Emergency Heat'-- (That is a new expression to me..)

And what is the 'Outside Fan' yo are speaking about?

And for basics-- are we talking about and electric heater-- a Gas heater, or what?

Is this a furnace-- or a wall or window unit-- Tell us more-- and we'll get to the next steps..

I am wondering why the house is so HOT-- Where is the thermostat?

Mack B

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I have two outside ac one for floor and other for upstairs and i button on heater auto and ac outside fan is running is that normal or not? and live on this new house for two years and cant find someone...


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Dec 20, 2010 | Goodman GMS90703BXA Heater

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I have a Goodman heat pump and the condenser fan and compressor will not switch on. The board green light says improperly grounded or flame sensor not sensing flame (both are incorrect). The AUX heat (gas)...


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1 Answer

Goodman A18-8 electronic furnance and AC troubleshooting.


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Where is the capacitor located on a coleman heatpump


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I have an outside vented wall mounted heater.It heats the room and before it shuts off the room gets as cold as when it started running.does that make sense?


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Compressor shuts down when warm outside


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