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Old 02-25-2007, 03:38 PM   #1
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Need help with thermostat


Hello,

I have central heat and air condition. I currently have a mercury thermostat and I would like to convert to a programmable digital thermostat. But when I look at the thermostats that are available at the local stores, I am not for sure if it is the right one that I need. For example, I do not know if my system is single pump, or 2 stage pump, or even a pump at all. Also, there is an “EM. HT.” selection on my mercury thermostat and I do not know what that is used for. All I know is that it is central heat and air and I have a large machine in a closet in the house and I have a large machine outside. If I cut on either the heat or air, the machine in the house comes on. But I was told the machine outside is for AC. Can you guys please help me figure out what the heck kind of system I have so I know how to it works and what to put for it.

Thanks…

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Old 02-25-2007, 09:12 PM   #2
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Need help with thermostat


Since you admitingly have little or no knowledge, in this it would be best to call on a local HVAC contractor to handel this repair.

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Old 02-25-2007, 10:44 PM   #3
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Need help with thermostat


Well, I have already bought a system and installed it. I bought the Honeywell 7500D. I guess I installed it right. It seems to work.
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