Chick, the link for the old post is here: http://www.aircondition.com/wwwboard/2002Q1/71375.html

Here is the problem, since I didn't find any blockages, I assume that I will have the same problem when I put on the new R/D and accumulator and recharge it.

When running, the receiver/dryer ices up, the POA valve ices up, but the outlet of the evaporator (where the capillary bulb from the expansion valve clamps to) stays at ambient temp. The expansion valve itself ices up. The sight glass, located just before the expansion valve, appears to "froth" and there is no perceptible refridgerant flow even with the proper charge. It looks like stagnant fluid bubbling.

When running at 1500rpm, ambient temp of 75F, system pressures are:
Hi side - 75psi
Low side - 5 in/Hg vacuum
POA pressure - 10psi

With the system running at the same conditions, but with the capillary bulb from the expansion valve immersed in icewater, the system pressures are:
Hi side - 70psi
Lo side - 0psi
POA pressre - 10psi

Sound like a bad POA valve? The POA pressure is way low.

Follow Ups:

• Re: Update on POA system woes Chick 8/02/2002 (0)