Posted by Texasmark1 on August 25, 2020 at 06:15:22 from (172.243.92.145):
In Reply to: Re: RV AC icing posted by Texasmark1 on August 25, 2020 at 06:05:55:
Funny, I just got up to refill my coffee cup and asked myself, why would low freon cause an icing problem when you would think low freon wouldn't be cooling as well.....well my simple mind came up with this answer:
The Expansion Valve, regulating the flow of freon, senses the temperature at the outlet of the evaporator. It adjusts the opening in the valve to keep the outlet just above freezing when operating normally. With low freon levels running through the line the valve thinks that the evaporator is too hot and opens wider to allow more freon resulting in an overcool condition....for the amount of air flowing across the evaporator at the time and temp. Just a thought.
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