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Re: Help with HVAC issue
Temp not changing is a blend door problem. The blend motors are on top and bottom of the HVAC box. I've forgotten which one is the RH temperature blend motor.
The top motor may be accessible by removing the radio but you may need to pull off the dash top. The motor on the bottom can be accessed by removing the kick cover.
The mode motor is above the throttle pedal on the side of the HVAC box. This is the motor that changes airflow to the floor through the defroster vents.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
Last edited by hatzie; 12-31-2022 at 04:27 PM.
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