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You need to be a bit more specific in your question. You state you have 1 AC system but 2 thermostats. What type of heating system do you have? Gas furnace, Boiler, Electric heat, Hot Water? Is your heating unit separate from your cooling unit?

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โˆ™ 2005-09-26 15:18:54
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Q: Is there a programmable thermostat for a unit that has 1 ac unit and 2 thermostats?
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What causes the outside AC compressor unit not come on after 7PM?

Improperly programmed programmable thermostat.


Can you have two thermostats for one AC unit?

yes, if the ac unit has 2 zones, you will need a thermostat for each zone. if the ac unit provides both ac and heat, you can connect a thermostat for each. not a good way to go. better to use 1 therm in that case that has a heat-cool switch on it so the unit is not putting out both heat and ac at the same time.


What is Cost of thermostat?

If you are looking for a programmable thermostat for your home, try Askarepairtech.com. They have good pricing.


Can I run two AC units with one thermostat?

I wanted to add some details: Currently I have two AC units on the roof that share returns and ducts, but are controlled by two thermostats separated by 2'. Can I run both units off the same thermostat? It seams no matter how I set the thermostats one unit ends up running more than the other. But maybe this is a good thing? Yes, you can operate both units from one thermostat. The best way would be to use a two stage thermostat. Then a relay will have to be installed in one of the units to separate the control transformers.


Can a faulty thermostat effect your central AC unit?

can a faluty thermostat affect your central ac working?


Why won't the thermostat turn the ac on and off?

You obviously have a problem with your ac unit which cannot be dianosed here.


What is wrong if a old ac unit never shuts off when thermostat is in auto do you think its the relay?

The AC unit is fully controlled by the contactor. If the unit turns off by thermostat control such as setting tstat to off, the contactor is ok. The thermostat could be the problem though. yeah i understand that but when i say old unit i mean its so old that the thermostat only have two cables the red one and the white one! the auto and cont the unit has it in the indoor unit!!!


How do you change the ac control to farhenhiet?

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All mercury bulb thermostats used for ac and heating must be level?

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Can you hook two central air con compressors to one thermostat if you have two thermostats side by side one for upstairs and the downstairs bedrooms and one for the living dining rooms and the den?

No. You must keep a separate thermostat for each air conditioning unit even if the two thermostats have been physically installed side-by-side.The reason is very simple to understand: a thermostat is, very roughly, a bit like the cruise control in a car. When the speed drops from the set speed the cruise control gives the engine some more gas until it senses that the car's speed is fast enough and then it reduces the gas supply to the engine to maintain the set speed. No car engine can share the same cruise control with another engine. It is exactly the same for two air conditioning units - they each need to have their own thermostat.Now this particular question itself raises yet another question: Why has the installer placed both thermostats alongside each other? That is not good practice at all!The installer was either "cutting corners" - to save having to do some extra wiring for each separate thermostat - or was plain incompetent.To ensure that a particular air conditoner is controlled correctly its thermostat must be installed somewhere within the "zone of cooling" for that air conditioner.You should have been asked which areas you want to be controlled the closest. If you chose say the main bedroom for Zone A and the living room for Zone B, that is where the thermostats for each air conditioner should have been placed. But, as they have been installed side-by-side, if they are both set to the same temperature then the zone furthest away from the thermostats may never be cooled enough or may be over-cooled, whilst the zone closest to the thermostats may be controlled ok.To understand the reason why that would be true, let's consider what would result if each thermostat were set to a different temperature: it is obvious that the thermostat set to the cooler temperature will keep its ac unit running long after the thermostat set to the higher temperature has turned off its own ac unit.The resulting overall effect depends on which of the two zones is set to be cooler: * If the "set-to-be-cooler" zone is the zone closest to the position of the two thermostats then that zone will be controlled ok but the more distant "set-to-be-warmer" zone may never get any air conditioning!That more distant zone could just heat up to the temperature of the outside air because its "own" thermostat is telling it that the air around it (meaning the thermostat, not the ac unit!) is cool enough already...* If the "set-to-be-cooler" zone is the zone furthestfrom the position of the two thermostats then that zone will, again, never be controlled properly because the ac unit in the nearer "set-to-be-warmer" zone will always turn off its ac unit to maintain a temperature that is warmer than the other, more distant zone requires.So, again, that more distant zone will always get too much cooling because its "own" thermostat is telling it that the air around it (meaning the thermostat, not the ac unit!) is not warm enough yet!


Where is the thermostat located on a 1993 Saturn sl?

The thermostat is located to the left of the headers right under the ac compressor. Generally all automotive thermostats are located near the where the large top hose connects to the engine.There is a housing that is usually connected to the engine with 2 or 3 bolts and this is where you will find the thermostat.


Why does your ac unit turn on and off?

Your a/c unit uses different relays(switches) that are energized when the thermostat calls for A/C.


Is it cheaper to leave your AC on all day?

No, it is better to replace your thermostat with a programmable one. You can typically save 10-15% on your bill by using a setback. It is an easy diy project.


Why is your home ac not cooling?

Need more specific information. Give more details. Is the outdoor unit running, is the indoor unit running, what type of thermostat, heatpump or straight AC.


Would it be more environmentally friendly to keep the air conditioning on the programmable thermostat at all times or to open the windows and then turn on the AC if it gets too hot?

You answered your own question correctly, use the progamammable thermostat, you will have less humidity to contend with and the unit will work less. the area you are trying too keep cool will be cool, the only time the unit will come on is when the temp goes above the set point that you have put in to maintain a cool temp.


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An AC unit isn't supposed to heat! If you mean a heat pump, then you may have a relay switch problem. Or maybe, your thermostat is in the cooling mode. Contact a repairman.


Can a refrigerator thermostat be used as a room thermostat?

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I had a 220 degree thermostat installed on my 01 Cavalier but I've noticed only 180 degree thermostats are sold for this type of car. What type of thermostat should be installed on an 01 Cavalier?

OE stat for this car should be 195 deg. stick with AC delco part


What are 3 examples of household appliances that use thermostats?

Furnace, Dryer, AC unit, stove, oven, or any other device that produce a temperature change that you regulate in some way.


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Check your thermostat


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What happens when a thermostat on an air conditioner system goes bad?

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Why does your ac go on and off by itself?

Either the thermostat is not set correctly or is ultra sensitive; or the unit is low on freon.


You have fill your home ac unit with freon but you have to set your thermostat at 50 before your unit turns on what does that mean?

Either the t stat is way out of calibration or it is not level.