R-Pro › Field cases › Refrigeration systems
TXV Blockage (Debris or Moisture Ice)
Likely causes
Orifice iced from moisture
Check: Warm TXV body with a warm cloth and check if low-side pressure recovers (confirms ice block)
What to do: Warm TXV body with a warm cloth and check if low-side pressure recovers (confirms ice block) → Moisture block: recover refrigerant → replace drier → evacuate → recharge → Debris block: recover refrigerant → clean screen or replace TXV → Always replace filter drier based on root cause
Screen clogged with debris or sludge
Check: Moisture block: recover refrigerant → replace drier → evacuate → recharge
What to do: Moisture block: recover refrigerant → replace drier → evacuate → recharge → Debris block: recover refrigerant → clean screen or replace TXV → Always replace filter drier based on root cause
The TXV is blocked, cutting off refrigerant supply. Address based on blockage type (moisture vs. debris). Moisture blockage will recur after temporary relief. Always replace the drier and perform thorough evacuation.
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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