Retired JSO wrote:
If the unit fan is set to auto and is trying to overcome a 3-5 degree temp differential between ambient and thermostat setting, the unit will stop momentarily and change fan speeds
This is a good explanation, as to first use, when differential is too great, while fan set to auto. However, after reaching/cooling to stat setting, fan and compressor should start/run, before temp climbs more than a couple of degrees.
OP...is the inside temp climbing too high, before stat is kicking in? At 20 yso, your stat may need replacement. If the unit cools the RV, like past years, it seems to be doing it's job.
You may want to monitor actual inside temps, with a known good digital thermometer. If the stat seems to be the culprit, I'd run fan continuous at high setting, until stat repaired/replaced.
Jerry
