4. "Heat" "Heat On" Fire Icon; Sun Icon . Find out the best temperature to heat your home and more ways your thermostat can help save you money this winter. The fan should also be turned to “on” or “auto.” Make sure that your thermostat is set to HEAT, not COOL, and ensure that the fan is set to AUTO. Your furnace may be blowing cold air because the filter is too dirty. Aux/Emergency Heat comes on in Cool Mode! I can also turn the fan mode to "on" and the fan will run. Fan set to AUTO. Check your thermostat and make sure that its set to HEAT, not COOL. 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. However, if the system is in cool mode and the fan is set to 'auto', nothing happens. I stumbled out into the hall and tried to turn it down but realized that it was at a pretty low temp already. If you recently turned your heat on, this could be the issue. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Turn on the thermostat and set the temperature so the heater comes on. Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. The heat and fan worked well over winter. Don’t worry, it happens more often than you think. Afterwards, continue to the next step. *If you are unable to change your System Mode to Heat, your thermostat may not be correctly configured. 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. Details. 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. Last week, I awoke in the middle of the night and accused my wife (wrongly, it turns out) of fiddling with the thermostat. If it does not come on, locate the circuit breaker for the central heating unit … There are a lot of options when it comes to thermostats, but they all control both heating and cooling. YES – Continue to the next step. Warmup’s Tempo Programmable Thermostat for underfloor heating utilises a digital screen to clearly set your heating schedule. The system switch should be on either “heat” or “auto” for the winter months. Make sure that you have toggled to the appropriate setting for the season. 3. 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. If your thermostat looks like this, make sure you change it to HEAT. NO – Change mode on thermostat to Heat, and then change the temperature setpoint so it's higher than the current temperature. Check the furnace’s air filter. Thermostat set to COOL. Then, check to be sure that the thermostat is set to a temperature high enough to trigger the furnace to emit heat. AUTO ensures that the blower will run only when the furnace heats the air. The other settings on your thermostat matter too. According to ENERGY STAR, setting your thermostat to 68 degrees Fahrenheit (20 degrees Celsius) when you’re home is the … 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). To be sure that your thermostat looks like this, make sure that you have toggled to the appropriate for. But they all control both heating and cooling system is in COOL mode and the fan is set to '... 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