Yes, the supervisor indicated that the head pressure is much higher when using the heat pump on these systems. I assume he attributed the failure to that.
I can clearly see the oily residue on the indoor unit fins - looks like the coil is made of aluminum. Perhaps manufacturers differ in the strength of the aluminum (cost?) and I wouldn't know if it's a contiguous piece or sectioned/ joined using some method. I simply cannot see where it's leaking from,
Quote:
Originally Posted by Xringer
R22 pressures run a good bit lower than R410a.
A 100 deg F, R22 = <200 PSI whereas R410a = >300 PSI.
One of the main problems with the change over to R410a has been it's pressure.
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