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Originally Posted by Rich Two guesses. Firstly, I believe the orginal factory installed viscous fan couplers to be marginal at best. So, the too high, high pressure reading could be due to inadequate airflow through the condensor. Second guess is that you could have a partial blockage in the system. Expansion valve in the evaporator would be one likely culprit.
One of these days I will replace my fan coupler and see how that affects the high pressure reading. I may also install an auxillary condensor fan.
For what it is worth, I am informed, but have no extraordinary expertise with AC maintenance. So, appreciate why I say guess. |
I have less experience with AC than anybody probably but going through some trouble shooting today at an AC shop and they were commenting that ths high side look too high and the low side normal. They "guessed" the fan clutch as well. They commented that they loose about 10% of their pull every year of age.
Probably not a bad idea to replace it anyway. It's a good thing to do in high temps