Heat Pump Pressures Dropping in Heat Mode in Morrisville
Morrisville · November 2026 · Matthew & Autumn · From our service records
What we found and did
During the fall heating maintenance on both heat pump systems, Matthew found that the second floor system's refrigerant pressures were beginning to drop and stay steady at a low PSI rate. He switched the system to cool mode, where the pressures rose to normal operating ranges, then switched back to heat mode and watched the pressures drop again. A careful visual inspection of the outdoor TXV showed ice buildup around the valve, which indicates a restriction in the valve itself. The TXV will need to be replaced, and an estimate for the repair was to be sent by email.


