Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Specific System Condition - TXV Restricted






KEY: 1. LOW SUCTION PRESSURE.
2. HIGHER THAN NORMAL OUTLET AIR TEMPERATURE.


THEN: Thermal Expansion Valve (TXV) may be restricted.

^ Confirm by touching the suction and discharge pipes at the compressor. Suction pipe will be warm to cool at low ambients and cool to cold at high ambients. The discharge pipe will be warm to hot.
^ This condition can lead to compressor chatter due to lack of oil.
^ Replace TXV
^ After repair return to diagnostic flow chart.