The "fix": I turned everything off at the service switch at my heater for five minutes to reset the system, turned things back on, and re-set the thermostat to MODE=AUTO and FAN=AUTO. Taking photos for these articles I kept switching my digital thermostat between OFF HEAT COOL AUTO - which led to having no heat at all. Well you would only do it once - after which your transmission would perhaps be in the road behind the car.ĭON'T keep switching your air conditioner, heat pump, or heating system on and off rapidly. Watch out: Imagine driving down the highway with the automatic transmission on your car set to the "D" for "drive" - would you switch the transmission into "R" for "Reverse" at 60 MPH? (No "R" does not stand for "Race").
Why do you think this might be? It's not smart to switch a heat pump or a combination heating and cooling system right from "COOL" over quickly to "HEAT" or vice-versa. On thermostats usually the "OFF" position is in the middle between "COOL" and "HEAT" positions. "OFF" switch on the thermostat or on the fan switch, if there is one, will tell the thermostat to keep the equipment it is controlling turned off regardless of whether we're in heating or cooling season.
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How to Use the "OFF" Switch Position on a Room Thermostat
This tells the thermostat what to do when temperatures fall (turn on the heating system) or when temperatures rise to the thermostat setting (turn off the heating system). How to Use the "HEAT" thermostat switch setting positionĭuring the heating season, when you will need warmth, set this switch to the "HEAT" position. Unless your system is a heat pump designed to switch back and forth in all seasons, or unless a special heater has been installed on your air conditioning compressor, suddenly turning the air conditioning system (and the compressor component of it) on when it has been cold can damage the compressor. It's a good idea not to turn your air conditioning system on in cooling mode when it has been cold outside in the last 24hours. This tells the thermostat what to do as temperature rises above the thermostat's setting (turn on the air conditioning system) or when room temperature falls below the thermostat's set temperature (turn off the air conditioner). How to Use the "COOL" thermostat switch setting positionĭuring the cooling season when you need air conditioning, set this switch to the "COOL" position. There may be a third position labeled "Off" which instructs the heating or air conditioning system not to run at all. The thing that confuses some building owners is that a thermostat that is used to control air conditioning as well as heating may have a "mode" switch that allows the occupant to change the thermostat between "Cooling" or "Air" or "Air Conditioning" mode and "Heat" or "Heating" mode. How does the COOL-OFF-HEAT Switch work on a heating or cooling thermostat? Details are just below. MODE SWITCH: Guide to Air Conditioning, Heat Pump, or Heating System COOL-OFF-HEAT Settings on Room Thermostat Switches Switches on Room Thermostats: what they do, how they work, how to set them Article Contents We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. We also explain what to do if your air handler blower fan won't turn off and keeps running continuously. We explain why you might want to leave the fan ON continuously, and we review use of the MODE switch to change between COOL, OFF or HEAT. How to set the room thermostat switches: this article explains the use, setting, and adjustment of the FAN On-Off and MAN-AUTO switches on room thermostats. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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