92 50950106/AP0313
Heater/Air Conditioner Filters
The optional heater and heater/air conditioner include two filters: fresh air intake
and recirculation air.
Refer to the Replacement Parts topic (page 68) for filter part numbers. Filters
should be replaced as needed.
Fresh Air Intake Filter: Located directly behind the cover on the HVAC
(heating, ventilating and air conditioning) housing mounted on the upper rear
corner of the cab. Remove the threaded knobs on both sides of the cover to
access the filter.
Recirculation Air Filters: Located behind the covers in the headliner
directly above the rear window. The access, remove the screws on either side
of the covers.
Important: Keeping the cab clean will reduce need for service and help ensure
proper air conditioner and heater operation. Failure to do so can cause evapo-
rator and heater core plugging, fan noise, vibration and failure.
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