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AC compressor runs constantly on 2000 Dodge Ram is this normal?
Wiki User
∙ 17y ago
No, this is not normal. The compressor should only run when the A/C or Defrost is turned on. The compressor should be inspected to see if the air gap between the clutch hub and the pulley is set correctly. The air gap should be set to the recommended OEM specification. The air gap should be spaced evenly around the pulley/clutch hub area. If the gap is closer on one side of the clutch than the other, the compressor may be damaged and should not be used. This condition could keep the compressor engaged constantly. The compressor could stay on if the electrical circuit, a black wire, gains a ground some place other than the Power Module. This circuit should be checked for proper grounds before going any farther. This system also has the possibility of a malfunction in the Power module, which can cause the compressor to stay engaged with the switch in the OFF position. When the wiring diagram is examined, look at the brown wire, is the power lead coming from a 25A fuse. This wire should have battery voltage when the key is in the RUN position. The Black wire is grounded through the Power Module. You may also have a defective Power Module, or in rare instances a defective power switch for the A/C.
Wiki User
∙ 17y ago
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