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Symptom
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Diagnostic procedure
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Also check for
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Recirculation control doors do not change between Fresh and Recirculate
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Heater controls, and A/C do not work
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Blower motor runs, but one or more speeds are inoperative
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Cleanliness and tightness of all connectors
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Blower motor does not run at all
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A/C condenser fan does not run at all (but radiator fan runs with the A/C on)
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Both fans do not run with the A/C on (but the A/C compressor runs with the A/C on)
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A/C compressor clutch does not engage (but both fans run with the A/C on)
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A/C system does not come on (both fans and the A/C compressor do not work); heater is OK
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