Heater dies

Step 1: Electrical connections

Check electrical connections for tightness.

Possible defect

Remedy

Loose connection

Check connections and secure

Step 2: Exhaust pipe

Check exhaust pipe for obstructions.

Possible defect

Remedy

Exhaust pipe partially blocked

Clean exhaust pipe (check condition of water drain hole) and, if necessary, install new one

Step 3: Thermo switch

Check cut-in time of glow element in glow-spark plug (at least 70 secs at nominal voltage and 86 F/30 C ambient temperature).

Possible defect

Remedy

Thermo switch defective (glow time too short)

Install new thermo switch

Step 4: Fuel pump

Check fuel pump delivery quantity.

Possible defect

Remedy

Delivery quantity too small due to

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