I have a 12KW window AC unit that has an electronic control. The old control had a problem randomly beeping and raising the temp by one degree. It would do this until the temp was over 80F. I never figured out what caused it to do this but it was replaced with a new one. The new one doesn't go random, but it also doesn't get as cool as the other one did. The compressor comes on a lot less often. I told the service guy and he says that the new control needs to be replaced. He says there is no adjustment.
When cleaning the filter I noticed that there is a small sensor mounted to the vents. It has a plastic base that is at least as wide as the sensor. At first I assumed that this sensor was to measure the amount of cool air returning to the unit. I took a piece of paper and covered the sensor to see if this would allow the compressor to come on more.(this didn't work). So I thought......the sensor could be to make sure there was air flow to the unit (so the more the better) I took the paper off and moved the sensor so less of the base was behind the sensor for more air flow to the sensor. (if this helped it only helped a little).
Can air flow to this sensor matter? Was the service guy right?