We welcome your comments and Ice forming on your refrigerant coils http://www.greenintegrateddesign.com/blog/why-are-my-air-conditioning-coils-freezing-over3. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. Clogged air filters could be causing cold air to blow out of your vents. View our Privacy Policy here. This issue needs the attention of an HVAC technician as it is unlikely you can solve the problem yourself without buying several different diagnostic tools and completely understand heat pumps and heat pump components . Possible Conclusion 1: It’s Not Blowing Cold Air If your heater is blowing warm air but that air is venting into the attic or mixing with colder air from your attic, then the net result will be that your heater is blowing cold air. If your ducts are leaking (and ENERGY STAR says that almost all homes leak about 30% of the air in their ducts), cold outside air is making its way into your ductwork. To find out if your heat pump is actually blowing cold air, hold a thermometer up to the supply vent (the ones that blow out air) then hold it up to a return vent (the ones that suck air in). Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. If problems persist consider calling a repairman. 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. Use the small wire brush to clean the gas release hole area for the furnace pilot light. Website operating A Green ID technician will be able to diagnose exactly where the problem is coming from and make the appropriate repairs. If it needs to be changed, put a clean on in before you do anything else. Heat pumps are highly efficient to about 32°F.Below freezing, your heat pump simply can’t draw enough heat from the cold air outside and will kick on its auxiliary heat mode to generate heat for your home. 3. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. Your thermostat has an ON and AUTO switch that runs your blower. Obviously having cold air blowing out of your vents 2. If you suddenly notice the unpleasant surprise of your cold air coming out of your vents several things may be happening to your heater to cause this strange phenomenon all centered on a “RESTRICTION” theme. … DoItYourself.com®, founded in 1995, is the leading independent Honeywell central heating not working blowing cold air constantly [ 0 Answers ] Hi, we have a honeywell central heating system. 2. If your central heating system is blowing out cold air, you'll have to follow these steps to repair it. How to test. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Once you are done, use the hand-held vacuum to remove any dirt left. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. Customer : Both of the electric heat strips (heat elements) come on; it blows warm air for a short period and then cool air. Your gas supply could be turned off. There is a new motor ... 5 Tips for Cleaning Your Central Heating... 5 Tips for Cleaning Your Central Heating System. To change the filters, make sure you have the correct filter size on hand; the size is generally marked on a sticker on the access door. There are a few reasons your heat pump could be blowing cold air. The filter dryer’s purpose is to catch contaminants from entering the compressor. But all you have to work with are the symptoms. Blower speed is set too low. The hot air is eventually blown in the house through ducts and vents. Dirty air filters can actually reduce the airflow into the heater enough to freeze the coils and put the heater into defrost mode so you want to be sure they are changed out regularly. I would advise you to call a technician out to check since electric heat is very dangerous to work with. It may seem over simplified but check your air filters and if it’s dirty. Still getting cold air from your furnace? If too many contaminants become caught in the filter medium, it can become clogged just like your air filters and restrict the flow of refrigerant to the compressor. Not having enough airflow over the coils can also cause a lack of heat transfer and drop the Freon temperature below freezing, which can start ice blocks to form over the refrigerant lines and coils. home improvement and repair website. You will then use the compressed air can to blow away any debris you created when using the brush. Loose wires or improper wiring can trick your heater to thinking it’s an air conditioner. The second type of restriction can come from blocked vents. Of course, any central residential HVAC system is supposed to provide cool air when it’s warm outside and heat when the outside temperature drops. To clean the pilot light, make sure the thermostat and gas flow are shut off. The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. 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