ron2
Posted : 7/21/2006 6:12:45 AM
Shameless plug, here. Allen's Plumbing and HVAC of Denison, Texas rocks.
Anyway, here's a tech tip for you. Take any old cheapie thermometer. Measure the temperature at the return air, also called intake, it is the grill, usually in the wall, where the system pulls in air to blow around. Then, measure the temperature at a diffuser grill, where cool air is supposed to come out. There should normally be a difference of about 18 degrees. That is, most home systems are designed to drop the incoming air by 18 degrees to cool down. Also, the cooler the house is, the deeper the temp difference should be.
Another tip. During the hottest days, you can run a sprinkler or soaker hose on your condenser. The evaporating effect of water will help dissipate heat. Also, wash off the condenser coils with a hard stream of water. Dirt can act like an insulator and not allow heat to escape the coils. Don't run water on the condenser on cooler days. Then, the freon won't get to the right temp and you could freeze out the system. So, only use that trick when it's over 100 F. Also, it's actually mor economical to pic a temp and leave it there than to let the house get really warm and then cool it down later in the day. Also, if you want to make it easy on your system, use the old style fiberglass spun filters. The pleated paper is like trying to breath through a pillow. It is largely a marketing gimmick to appeal to germaphobes. As a tradesman, I have breathed far worse stuff than a little bit of dust in the house. Change the filter only once a month. If you are not capable of cleaning the central unit yourself, then it is worth having once a year or two a service call for a tech to clean the whole system. It may cost 100 dollars but it will keep your system working right. I did that myself this spring when I was having problems with brittle wire to the compressor.