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View Full Version : Heat pump : high BACK and low HEAD



pawn
06-22-2005, 11:08 PM
I had a problem with this unit today there was a new outdoor unit installed about 2 months ago and the tenant claims that the unit is not cooling the same I put my gauges on it and notice that the back pressure was 80 psi and the head pressure was 150 psi and putting a charge in it was like pulling teeth, the suction line is sweating good. supply is 61f, suction line was about 63f. What is going on with this unit. Its NOT a leak service valves are new and not a restriction any where by the look of my pressures. Thank you for any comments

miami mike
06-22-2005, 11:13 PM
Indoor and outdoor temps?

Subcooling?

Delta across coil?

Need more info.

RoBoTeq
06-23-2005, 12:37 AM
Sounds like an oversized metering device.

beenthere
06-23-2005, 05:10 AM
Did some one install a smaller outdoor unit then what was originally there?

hackmaster
06-23-2005, 10:01 AM
Wrong size or missing piston.