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	Change condition by