I believe they were just replaced (we just - Answered by a verified HVAC Technician ... its only blowing air, not cold air. Color wires are weird due to swapping from conventional to heat pump. However, it would not turn on the fan or generate any heat. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. The ecobee powered on without issues. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. 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. To Set Thermostat to Auto Mode. I have a heat pump and air handler. Last night the it seemed to be running, but was blowing cold air. 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. I have a carrier 5 ton heat pump. We followed the troubleshooting in the manual and even reset the thermostat twice to original factory settings. 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. Go to System. My AC will not blow cool air. Two Reasons Your Heat Pump Is Blowing Cold Air. My old thermostat everything works just fine but ecobee blows cold air on cold or heat. This is plenty warm to heat your home to your desired 72°F. Then select HVAC. Let us explain… The air could be warm but still feel cool. My furnace is a Trane XL80 and my heat pump is a Trane XE1000 Weatheron. Heat pumps usually produce air that is 85-92°F. 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. Press Menu on the main screen. ... otherwise the thermostat will lock out the heatpump and change over to aux heat as the weather outside will be too cold to run the heatpump unit that's sitting outside. Set the HVAC to Auto. I have Red - Rc Green - G Yellow - Y1 Blue - O/B Added wire - White - Common White - W1. I have an ecobee 3 I just installed and is blowing hot air when set to AC. 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. This morning neither the burners or the blower wou … Back on … It only showed heat from the boiler which I troubleshot and changed it to HVAC/furnace. Clogged air filters could be causing cold air to blow out of your vents. 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. I immediately contacted Ecobee technical support and told them what was going on. 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