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 MANUALSBUICK1998RIVIERAREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C - HEATER SYSTEM
1998 Buick Riviera
A/C - Heater System
1998 Buick RivieraSECTION A/C - Heater System
- A/C System Specifications
- Description
- Operation
- Temperature & Mode Settings
- Trouble Shooting
- Testing
- Notes
- A/C System Performance
- A/C Functional Test
- ACCESSING & CLEARING DTCs
- DTC 015: Solar Sensor Circuit Open Or Shorted (Drivers); DTC 008: Solar Sensor Circuit Open Or Shorted (Passenger)
- DTC 010: Ambient Temperature Sensor Circuit Open Or Shorted
- DTC 013: Inside Temperature Sensor Circuit Open Or Shorted
- DTC 034: Passenger Climate Control To Programmer Data Loss
- DTC 035: A/C-Heater Control Assembly To Programmer Data Loss
- DTC 038: Loss Of Serial Data (UART)
- DTC 052: A/C-Heater Programmer Loss Of Keep Alive Memory (KAM)
- DTC 340, DTC 341, DTC 349, DTC 350, DTC 351: Feedback Out Of Range
- Removal & Installation
- Torque Specifications
- Wiring Diagrams
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.