Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: My air conditioning unit is
90 percent of the time the freon charge is low and lack of freon lessens the amount of compressed heat that can be created and also the amount of heat that can be extracted. hence less cooling and less heating. however the exact same thing can occur when a change over valve gets stuck partially between heat and cool . it then mixes the hot and cold together and you get poor cooling and poor heating. you check it with a gage. fed law requires that you have an epa certification to apply a gage. low pressures in heat and cool on both high and low pressure gages are a sign of low charge. if low pressure and high pressure are close to the same on both gages then a good chance valve is stuck half way between. you can also sometimes check by feel . at the change over valve two lines should be virtually to hot to touch and two should be cold to the touch. one is heating flow and other is cooling flow. if the valve is stuck then temps will be within a few degrees of the same on all. low charge and the hot lines won't be hot hardly .and the cold line s barely cool. look for white frost forming in the heat mode outside at the condensor tubing shortly after you turn on the heat. thats a sign of low charge. good luck.
Posted on Nov 04, 2008
Don't know how long you have had a heat pump but thats the nature of them in colder weather. Some people prefer to switch to "emergency heat" on the t-stat when temps fall below 20 or 25 degrees. This bypasses the heat pump and allows your back-up heat to heat the house. If your house is total electric your emergency heat is an electric furnace and it should handle the load if it was sized properly. Don't leave it on emergency when it warms up because your heat pump is much cheaper to operate than the furnace. As always, check your air filter since it can restrict the amount of air that moves thru the furnace, which is critical. Hope this helps
Posted on Dec 23, 2008
When the unit is running, go outside and put your hand near the condenser fins, this air that comes out should be slightly warmer than the ambient temp. If it is not you will need to take the unit out of the window and out of its outer case and clean the condenser fins from the inside, this is no easy task as it is very hard to reach. You will want to get a small (toothbrushed sized) brass bristled brush with a long handle. Make sure the evaporator coil (in the front) recieves the same attention and wash the mesh filter that goes in front of the evaporator. Re- assemble and enjoy the cold air.
Posted on Jun 07, 2009
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