Volkswagen Golf 1999 Service Manual page 3927

A/C refrigerant system, troubleshooting
Test 1
Temperature
from center air
1)
vent
Normal
Too high
Too high
Normal
Normal
Too high
Normal
1)
Normal air outlet temperature approx. 6 C (43 F). For higher ambient temperatures
and/or higher humidity, specified air temperature from center instrument panel vent can
be slightly higher.
2)
For normal system temperatures and pressures
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Test 2 Test 3
High Low
2)
pressure pressure
Normal Normal
Normal Normal
Too low Normal
Too low Normal
Normal Too high or
too low
Normal Too high or
too low
Too high or Too high or
too low too low
Possible
causes of
incorrect
2) readings
None
Temperature flap
position
incorrect
Compressor
Compressor
Expansion valve
or compressor
Page 87-120
Página 7 de 10
87-137
Corrective
measures
---
Adjust temperature
flap cable
Replace
compressor
Replace
compressor
Clean/replace
expansion valve or
replace compressor
.
13/2/2005