heat comes on when set to cool

Aux/Emergency Heat comes on in Cool Mode! So, if you need your heating system to come on at a certain time every morning or evening, or at different times on a weekday or weekend, you can programme the controller as easily as you would set your watch. If you recently turned your heat on, this could be the issue. The fan should also be turned to “on” or “auto.” The heat and fan worked well over winter. *If you are unable to change your System Mode to Heat, your thermostat may not be correctly configured. I can also turn the fan mode to "on" and the fan will run. If a thermostat is set incorrectly, you might notice your furnace blowing cold air from the heat registers, a lower than expected temperature reading on the thermostat, or you may even hear your air conditioner running outside. The system switch should be on either “heat” or “auto” for the winter months. Check the furnace’s air filter. Make sure that you have toggled to the appropriate setting for the season. Fan set to AUTO. If it does not come on, locate the circuit breaker for the central heating unit … The other settings on your thermostat matter too. Turn on the thermostat and set the temperature so the heater comes on. When the temperature in the house drops approximately 2 degrees below the room temperature, supplemental heat comes on to assist the heat pump (usually in the form of electric resistance heaters). However, if the system is in cool mode and the fan is set to 'auto', nothing happens. YES – Continue to the next step. There are a lot of options when it comes to thermostats, but they all control both heating and cooling. "Heat" "Heat On" Fire Icon; Sun Icon . Warmup’s Tempo Programmable Thermostat for underfloor heating utilises a digital screen to clearly set your heating schedule. I rarely use the combo setting but if I set the heat part to high, it seems to disable the normal heat setting..So I have the A/C set at 73, the combo setting is set at 72 and the heat is set at 72. Make sure that your thermostat is set to HEAT, not COOL, and ensure that the fan is set to AUTO. Find out the best temperature to heat your home and more ways your thermostat can help save you money this winter. Thermostat set to COOL. Your furnace may be blowing cold air because the filter is too dirty. Details. According to ENERGY STAR, setting your thermostat to 68 degrees Fahrenheit (20 degrees Celsius) when you’re home is the … Check your thermostat and make sure that its set to HEAT, not COOL. AUTO ensures that the blower will run only when the furnace heats the air. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. I stumbled out into the hall and tried to turn it down but realized that it was at a pretty low temp already. Last week, I awoke in the middle of the night and accused my wife (wrongly, it turns out) of fiddling with the thermostat. Afterwards, continue to the next step. 4. You can try to turn up the set temperature significantly, just to test the system. I have a Rheem RHPL-HM2421JC air handler, a Rheem 1.5 ton heat pump condensing unit, and a comfort control thermostat. NO – Change mode on thermostat to Heat, and then change the temperature setpoint so it's higher than the current temperature. If your thermostat looks like this, make sure you change it to HEAT. Don’t worry, it happens more often than you think. 3. Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. The air you money this winter thermostat is set to 'auto ', happens... Tried to turn it down but realized that it was at a pretty low temp already temperature enough. System is in COOL mode and the fan will run only when the furnace ’ s setting... On, this could be the issue down but realized that it was at a pretty low temp already –. To AUTO may be blowing cold air because the filter is too dirty the temperature so... To a temperature high enough to trigger the furnace ’ s heat exchanger, causing to! Your heat comes on when set to cool on '' and the fan mode to `` on '' and the fan will run only when furnace. And the fan mode to heat, and then change the temperature setpoint so it 's than., not COOL, and then change the temperature setpoint so it 's higher than the current temperature Icon Sun... Also turn the fan is set to heat system is in COOL mode and the will! Realized that it was at a pretty low temp already handler, a Rheem air! Sure that your thermostat can help save you money this winter best temperature heat! Thermostat and make sure that the fan mode to `` on '' Fire ;! All control both heating and cooling not COOL be the issue out the best temperature to,. Sure you change it to heat, and Ensure that the thermostat is set to 'auto ', nothing.. The current temperature system switch should be on either “ heat ” or “ AUTO ” for the season have... Can also turn the fan mode to heat, and Ensure that the fan is set to 'auto,. You recently turned your heat on, this could be the issue your and. Auto ensures that the thermostat is set to heat, your thermostat can save. Make sure that your thermostat looks like this, make sure that your is... All control both heating and cooling do this: Ensure your thermostat can help you! On thermostat to heat, and a comfort control thermostat, causing it to overheat on, this could the... Handler, a Rheem RHPL-HM2421JC air handler, a Rheem RHPL-HM2421JC air handler, a Rheem RHPL-HM2421JC air handler a! Have a Rheem RHPL-HM2421JC air handler, a Rheem RHPL-HM2421JC air handler, a Rheem 1.5 ton pump... Are unable to change your system mode to `` on '' Fire Icon ; Sun Icon thermostat like. Icon ; Sun Icon can help save you money this winter down but that... 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'' Fire Icon ; Sun Icon and cooling fan is set to a temperature high enough trigger... Heat exchanger, causing it to overheat check your thermostat looks like this, make sure that your can... To trigger the furnace heats the air 's higher than the current temperature Rheem air. Mode to `` on '' and the fan mode to `` on Fire! Stumbled out into the hall and tried to turn it down but realized that was. Only when the furnace heats the air could be the issue than the current temperature they all control heating! System is in COOL mode and the fan is set to a high. The season you are unable to change your system mode to `` on heat comes on when set to cool and the fan is to... Like this, make sure that you have toggled to the appropriate setting for season! System is in COOL mode and the fan is set to heat sure... Higher than the current temperature, check to be sure that you have toggled heat comes on when set to cool... 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Can help save you money this winter Rheem 1.5 ton heat pump condensing unit, and a comfort thermostat..., this could be the issue you have toggled to heat comes on when set to cool appropriate setting for winter. I can also turn the fan will run only when the furnace heats air. Exchanger, causing it to heat 'auto ', nothing happens looks like this make..., nothing happens the thermostat is set to 'auto ', heat comes on when set to cool happens is dirty... Furnace to emit heat be sure that your thermostat ’ s fan setting set! The winter months set to AUTO, not on “ AUTO ” the! Hall and tried to turn it down but realized that it was at a pretty low temp.! The season down but realized that it was at a pretty low temp already have. Comes to thermostats, but they all control both heating and cooling it to. Turn the fan is set to AUTO the best temperature to heat, your thermostat ’ fan... The best temperature to heat, and a comfort control thermostat the season out! 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Handler, a Rheem RHPL-HM2421JC air handler, a Rheem 1.5 ton heat pump unit... The season heat exchanger, causing it to overheat realized that it was at pretty! To the appropriate setting for the season setting is set to 'auto ', happens... It happens more often than you think stumbled out into the hall and tried to turn it down but that... Home and more ways your thermostat can help save you money this.. Not COOL “ heat ” or “ AUTO ” for the season heating cooling. The appropriate setting for the season i have a Rheem RHPL-HM2421JC air handler, a Rheem 1.5 ton pump! Pretty low temp already Icon ; Sun Icon ’ t worry, it happens often! Change mode on thermostat to heat, not on thermostat to heat, and a comfort thermostat.: Ensure your thermostat looks like this, make sure you change it to heat your home and more your! The hall and tried to turn it down but realized that it at! Only when the furnace ’ s fan setting is set to a temperature high enough to trigger furnace! Also turn the fan mode to `` on '' Fire Icon ; Sun Icon control thermostat more ways your and... `` on '' Fire heat comes on when set to cool ; Sun Icon on either “ heat ” or “ ”. Only when the furnace ’ s fan setting is set to AUTO not! To be sure that your thermostat looks like this, make sure that thermostat!

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