While conventional gas or electric furnaces blow hot air, from 130 to 140 degrees for short periods of time, a heat pump will gently blow warm air, from 110 to 115 degrees and stay on longer to circulate it. Plus, the colder it gets outside, the lower the temperature of the air a heat pump can produce. Still Have a Heater that is Blowing Cold Air? One such issue is when the heat pump seems to be blowing out cold air even while in heating mode, which is likely to make them start fiddling with the thermostat in hopes of fixing the perceived problem. A furnace typically puts out air at around 130 degrees, whereas warm air from a heat pump is only a little over 90 degrees on a moderately cold day. In contrast, a heat pump running by itself (with no supplemental backup heat) on a 35 degree day, depending on indoor house temperature might only put out 92 degree air. It’s Defrosting. But when it does, having your heat pump blow cold air is the last thing you need. Heat pumps work much more gradually, and maintain comfort by keeping a steady flow of warm air … Since you don't know if it ever worked calling in a pro might be best. Haven’t had any issues with it until the past few weeks. This is above my head but this article may help: https://nest.com/support/article/How-does-Nest-manage-different-stages-of-heating-and-cooling. Your heat pump might be marathoning due to these reasons: We’re having a cold winter. Here our experts at M&M Heating & Air Conditioning explain why this happens and whether or not it’s a cause for concern. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. When set to on, your heat pump will blow air whether it’s heated air or not. Your FAN setting should be set to AUTO, not ON. If it gets too cold outside, your heat pump’s outdoor unit may freeze, causing your system to go into defrost mode. A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. While this may seem like an issue, your heat pump can usually heat your home just fine, but when it’s extremely cold out (below 30 degrees), it just takes your system a little longer to do so. The reversing valve is a vital component in heat pump … To determine if this is your issue, go outside and take a look at your outdoor unit (compressor). Blowing hot air means you probably wired it according to the conventional row on your old thermostat instead of the heat pump row. If you recently turned your heat on, this could be the issue. George Brazil Air Conditioning and Heating provides the Phoenix area with, body’s average temperature is around 98 degrees, Your heat pump is fine, you just think your heat pump is blowing “cold” air, Your heat pump is actually blowing cold air, in which case there is likely an issue with your system, Thermostat accidentally set to “cool” mode. Here is the old thermostat wiring: Original Thermostat Wiring This wiring was copied to the Nest: Nest Wiring If your ducts have cracks or worse, … Size is not a matter of preference. After installing the Nest, during the heat pump test, my system blows warm air just fine.BUT, for the aux heat test, the air is not warm, and feels like room temp or slightly colder.. This isn’t a problem when it’s 55 degrees outside—your system will expel air that’s a toasty warm 110 degrees or so. It seems pretty warm, but 80 degrees is much cooler than the average body temperature (98.6 degrees Fahrenheit) and could feel like cold air blowing into the home. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. If your heat pump is blowing some cold air, there are a few things that may be going wrong. Make sure the thermostat is set to “AUTO”, not “ON”. Do you know what setting it is to change? Here’s why: The average body temperature is around 98.6 °F. In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it is outside. We’re not calling you crazy, but hear us out. Luckily, almost all of them are an easy fix for a certified heat pump repair team. So what’s defrost mode? As we mentioned above, your heat pump heats your home by drawing in warm air from outside. When in defrost mode, your heat pump starts transferring heat out of your home (towards your outdoor unit) instead of transferring heat inside your home. https://nest.com/support/article/How-does-Nest-manage-different-stages-of-heating-and-cooling. theres a setting you can change to fix this. Alt heat means the heat pump is turned off and the other source (usually gas furnace) is asked to heat. But when the winter weather drops to 40 degrees, that means your system will blow air … We are Arizona’s most trusted HVAC pros and we’d be happy to help you repair any heat pump issues you’re facing. If so, your heat pump is blowing warm air that just feels cold to you. Run fan every hour for x mins.. … Possible Conclusion 2: There’s a Problem that Needs Repair. Don't panic if you see frost on your outside equipment's coil. The “HEAT” setting will cause your heat pump to operate in heating mode and blow warm air instead, but only if there is a call from the thermostat. Heat pumps vary in this aspect, some energise the reversing valve in cool mode, some de-energize it in cooling mode... if the factory nest programming has the heat pump operating in heat when it should be in cool... they ask you to manually reverse that function (page 22 last item, its a set up operation, after that it will be automatic) Otherwise you will need reverse engineer and figure out what you have and how Nest should be set up. Think you may have an issue with your heat pump and want a skilled professional to take a look? This transfer of warm air to your outdoor unit helps to melt any ice on your outdoor unit. This kicks on if your heat pump can’t handle things in its usual way. If gas supply is interrupted for any reason, the gas furnace pilot light will go out. If your heat pump is blowing cold air, look outside and see if your outdoor unit is frozen or has frost on it. When this happens, your heat pump is essentially in “cooling mode,” which is why you may feel cold air coming from your vents. As you might imagine, heat pump operation in cold weather is not the best, which is why they are typically only used in temperate climates...think beaches, palm trees, and oranges. Problems that will cause your heat pump to blow cold air in the winter include: Your heat pump condenser tripped the breaker, so its blowing cold air. The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. 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