Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE196998 ENG CD UO, NOT AVAILABLE TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAUTOMATIC TEMPERATURE CONTROLTESTINGFUNCTIONAL TESTS (NORMALLY OPERATING SYSTEM)
1969 Oldsmobile 98 Eng CD UO, Not Available Trans
Functional Tests (Normally Operating System)
1969 Oldsmobile 98 Eng CD UO, Not Available TransSECTION Functional Tests (Normally Operating System)
This test is made with engine operating and coolant warm:
- Set control lever in OFF position and rotate temperature dial to max. heat position. No air should flow from any outlets. Move control lever to NORMAL LO position which should cause blower to come on high speed and hot air to come chiefly from heater outlet with some air from defroster outlets. Move control lever to NORMAL HI position which should cause blower speed and air flow to increase.
- Rotate temperature dial to max. cold position (65°F.). This should cause cold air to come from the air conditioning outlets and the blower speed to go from high down through low and up to high. Move control lever to DEFROST position. Cold air should come chiefly from defroster outlets, with some air from heater outlet. Move control lever to DE-ICE position. Hot air comes chiefly from defroster outlets, with some air from heater outlet, and blower should operate on high speed.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.