The unit is running fine as far as I can tell, but I can only get the house down to 80 degrees in the daytime. At night it will get down to whatever I set it at. I have changed the batteries in the thermostat, changed the air filter, hosed down the out side unit, and turned it off for several hours. The pipe leading from the unit into the house is extremely cold and even a bit frosty in the middle of the day. Anything else I can do before I call an HVAC?
2007-08-01 08:48:23 · 4 answers · asked by Greg A 2 in Home & Garden ➔ Maintenance & Repairs
trane......there is you problem ;)
think you have a leak,call for service
SERIOUSLY, you have a leak or restriction and need to call a HVAC serviceman
and make sure it is the proper size!
2007-08-01 08:55:00 · answer #1 · answered by sreshowtime 3 · 0⤊ 1⤋
If the pipe (large pipe) is extremely and has a little frost (not ice) on it, that sounds OK.
If you can look at the A-Coil evaporator (usually mounted above the furnace) - look to see if there is ice build on the coil.
Ice build-up can mean:
You hosed it down, but did you remove the outer housing and clean the aluminum fins of the condensor coils? The condensor cooling fan blows the air up, drawing the air in through the sides through the condensor coils. Be careful not to bend the aluminum fins; straighten any that are bent. It is best to brush them off with a stiff brush (not a wire brush) and spray your hose from the inside to force the build-up out. Clean up the debris and replace the outer housing.
The Condensor outside airflow is restricted. Do you have a fence, bushes, etc near it? They can reduce the airflow so the heat is not removed from the condensor fast enough. this will unbalance the whole system and reduce it's cooling capacity
The thermostat is set too for the outside temperature.
Low refrigerant - requires topping up by a HVAC mechanic. they have the equipment andguages to do this properly.
Typically an A/C unit mainly removes the humidity. If the humidity is not too high, it will then cool the air. the units are usually designed to reduce the temperature by about 15 to 25 degrees depending on the amount of moist that has to be removed.
If all of the above has been done you may have to have it serviced.
2007-08-02 18:36:17 · answer #2 · answered by Comp-Elect 7 · 0⤊ 0⤋
How hot is it where you are? If it is pushing 100 degrees outside, then getting the inside temperature down to 80 might simply be the limit of your system. Typically they are designed to maintain a maximum differential with the outside air of 15 degrees. Regardless you should start saving your pennies because your 17 year old system probably does not have many more summers left in it.
2007-08-01 17:11:26 · answer #3 · answered by Brian A 7 · 1⤊ 0⤋
If by 'frosty' you mean there's actual ice on the line you have a problem. It sounds like low airflow. Since you've checked the filter, other causes might be blocked or inadequate return air, dirty evaporator coil--very common, blocked or inadequate supply air (too many closed registers maybe), loose belt--if it's an old belt drive furnace, dirty squirrel cage.
2007-08-01 16:40:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋