OMKK36433

Symptom	Problem	Solution
Dust entering inside the cab	Loose cab air filter element	Check cab air filter for correct installation.
	Damaged seal around cab air filters, or damaged cab air filters	Replace cab air filters. (See Replace Cab Air Recirculation Filter and Replace Fresh Air Filters in Service—As Required Section.)
	Excessive air leak	Check cab air filter mounting.

Blower air flow too low	Clogged filter or air intake screen	Clean.
	Heater core or evaporator core clogged	Clean.

Heater does not shutoff

Heater hoses connected incorrectly

See your John Deere dealer.

Air conditioning system not cooling	Insufficient blower speed	Increase the blower speed.
	Dirty cab air filters	Replace the cab air filters. (See Replace Cab Air Recirculation Filter and Replace Fresh Air Filters in Service—As Required Section.)
	Dirty side and front screens, radiator, air conditioner condenser, radiator screen, and air conditioner condenser screen	Clean.
	Heater hoses installed backwards	Install heater hoses correctly. (See your John Deere dealer.)
	Low voltage	Have John Deere dealer to check charging system.
	Low refrigerant	Have John Deere dealer to check refrigerant level.
	Engine fan/alternator belt slipping	Check belt tension.
	Heater on	Turn heater to Off position.
	Outside temperature too low: below 21°C (70°F)	Wait until day gets warmer. If there is a malfunction in system, see your John Deere dealer.
	Loose wiring connector	Tighten it.
	Air conditioner compressor stuck	Rock compressor pulley back and forth.
	Defective temperature control switch	See your John Deere dealer.
	Restriction in refrigerant system (High pressure switch disengages system)	See your John Deere dealer.
	Faulty expansion valve	See your John Deere dealer.
	Clogged line strainer	See your John Deere dealer.

Intermittent cooling

Air restriction

Clean side and front screens, radiator, air conditioner condenser, radiator screen, and air conditioner condenser screen.

Water leaking from under the operator’s seat	Clogged air conditioner condenser drain hoses	Clean drain hoses.
	Heater hoses leaking	Replace heater hoses.

Radio does not work

Blown fuse

Replace fuse.

Strange odors inside the operator's cab	Dirty cab air filters	Replace cab air filters.
	Clogged drain tubes	Clean.
	Evaporator condenser pan dirty	Clean pan and outlet with compressed air.

Ice flecks blowing from evaporator

Shut off the air conditioner

See your John Deere dealer.

Cab pressure indicator reading at low end of indicator	Cab blower switch turned off	Turn on switch.
	Door or window not latched	Latch door or window.
	Clogged cab air filters	Replace the cab air filters. (See Replace Cab Air Recirculation Filter and Replace Fresh Air Filters in Service—As Required Section.)
	Damaged door or window seals	Replace the damaged seals.
	Lost seals around the operator’s cab components	Seal all operator’s cab openings.
	Problem cannot be identified and corrected	See your John Deere dealer.

Cab pressure indicator reading at high end of indicator	Damaged seal around the cab air filter element	Replace the cab air filter. (See Replace Cab Air Recirculation Filter and Replace Fresh Air Filters in Service—As Required Section.)
	Missing, or incorrect air filter	Replace the cab air filter. (See Replace Cab Air Recirculation Filter and Replace Fresh Air Filters in Service—As Required Section.)
	Air filter not seated properly	Install it correctly.
	Problem cannot be identified and corrected	See your John Deere dealer.

TS95756,00004D0-19-20170327