I have a heat pump and air handler. Go to System. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Set the HVAC to Auto. Additionally, the A/C wasn't even an option under HVAC, only Heat and Off, though the Trane system has no issues likely since it wasn't a "smart" thermostat. Let us explain… The air could be warm but still feel cool. How to minimize the use of auxiliary heat with a heat-pump on your ecobee thermostat Question: We have a heat pump and recently installed the ecobee 3. Clogged air filters could be causing cold air to blow out of your vents. We followed the troubleshooting in the manual and even reset the thermostat twice to original factory settings. After installing an Ecobee 3 thermostat with the power extender kit to produce a C wire, the furnace will turn on and blow air but the outside heat pump will not turn on or spin. Last night the it seemed to be running, but was blowing cold air. I believe they were just replaced (we just - Answered by a verified HVAC Technician ... its only blowing air, not cold air. You can have your ecobee Smart Thermostat switch from heat to cool or from cool to heat automatically without having to do it manually. Two Reasons Your Heat Pump Is Blowing Cold Air. Color wires are weird due to swapping from conventional to heat pump. I immediately contacted Ecobee technical support and told them what was going on. Heat pumps usually produce air that is 85-92°F. Then select HVAC. My old thermostat everything works just fine but ecobee blows cold air on cold or heat. Back on … My AC will not blow cool air. My furnace is a Trane XL80 and my heat pump is a Trane XE1000 Weatheron. This morning neither the burners or the blower wou … I have Red - Rc Green - G Yellow - Y1 Blue - O/B Added wire - White - Common White - W1. The brand new Ecobee thermostat was somehow set to 81 degrees and climbing with no end in sight even though it was still set to 70 degrees. The ecobee powered on without issues. I have an ecobee 3 I just installed and is blowing hot air when set to AC. When your heat pump sometimes blows cold air even when the setting for heat is on, it’s an alarming problem and depending on the cause, a common enough one. I have a York two stage AFUE 96% furnace, installed 9 years ago (model TM9T060-12). Press Menu on the main screen. I have a carrier 5 ton heat pump. To Set Thermostat to Auto Mode. However, it would not turn on the fan or generate any heat. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. 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