[Richard]

I understand the impact of ambient. And I don't have readings from the Dometic system at that temp. My readings were in the 90 to 95 ambient range as best I remember.

It's easy for me to say to add a little gas and see what happens because I have the gas (Rhonda would agree) and the gauges. It's a much more expensive proposition when we are paying for a service call.

You can buy a nice set of gauges and a few small cans of R22 (ebay) for less than the service call.