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
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Evaporator Temperature Sensor / Switch: Testing and Inspection
1. Turn ignition On, turn blower On, and measure voltage at terminals L/W and R/B of the thermo switch connector.
2. L/W should read 0V, if not, repair wiring as necessary.
3. R/B should read 12V, if not check ECU operation. If 12V is read and evaporator surface temperature is below 32°F, system is operating normal. If not, replace thermo switch.