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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Pinpoint Test 2

PINPOINT TEST 2: INSUFFICIENT, ERRATIC, OR NO HEAT

Step 1 - 3:

Step 4:

Normal Operation
Under normal operation, when heat is selected on the temperature control switch and the blower motor switch is turned on, the blower motor directs air through the heater core. The heater core is filled with heated engine coolant.

Possible Causes
- engine cooling system
- temperature control switch
- temperature control cable