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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSOLDSMOBILE1985DELTA 88 V6-231 3.8LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYDESCRIPTION AND OPERATION
1985 Oldsmobile Delta 88 V6-231 3.8L
Control Assembly: Description and Operation
1985 Oldsmobile Delta 88 V6-231 3.8LSECTION Description and Operation
Control Panel:
The control panel, Fig. 1, permits system control by means of a selector lever, a temperature control lever and a fan switch.
The selector panel permits selection of mode of operation (OFF, MAX, NORM, BI-LEVEL, VENT, HEATER, DEFROST) by positioning a master (select) electrical switch and a vacuum select valve. The vacuum select valve controls flow of hot water to the heater core and applies vacuum to or vents the vacuum diaphragms which control the movement of the air valves in the heater case and the air inlet assembly. The select (electrical) switch position controls the compressor and also provides power to the fan switch.
The temperature lever selects the desired comfort level (65-70-75-80-85) by positioning a cam on the control panel. The cam operates a bowden cable which references the programmer assembly. The programmer assembly then controls the heater case temperature valve to regulate air outlet temperature to maintain the selected comfort level.
The fan switch permits selection of four blower speeds.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.