Service manual

Group 170 Preventive Maintenance

Check Heater and Air Conditioning

Note: For further information refer to literature in Func-

tion Group 8.

Check function of heater and air conditioning. Operate

the controls and let the fan run on all speeds.

Note: In the summertime, the shut-off valves for the

heater may be closed for the season. Open valves be-

fore testing heater.