Quote:
Originally Posted by jrref
The best way, and probably the most accurate way to check if you A/C is running correctly temperature wise is to take a temperature probe and stick it through the foam return duct at your air handler and take a reading then do the same at the output at the top of the air handler. The most you should see is a 20 degree temperature differential. 15-20 degree differential is considered "normal" but it should be close to 20 degrees once running for about 15 minutes. This will remove all the other variables trying to measure against the outside temperature. You can then take blue tape and cover the holes for next time. These HVAC temperature probes are available on amazon. Amazon.com |
I don't disagree with your technical method. But, my thermostat is always set on 78 degrees and, on some days, the outside temperature has exceeded 100 degrees, with no increase in the inside temperature. So, my system is able to maintain at least a 22 degree difference between the outside and inside temperatures. I have several outside and inside thermometers, so I know this is correct. I have not tested it to see if I can lower the thermostat setting and achieve a lower inside temperature. I don't know what other variables I would need to consider.