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When you turn on the heater or air conditioner on your 1992 buick lasabre it makes a grinding noise How do you fix it?
Wiki User
∙ 14y ago
is the noise coming from outside/engine or inside from your dashboard/air outlet ?
is your air condition still cools efficiently ?
is your heater heating properly ?
for outside noise,
>while engine running, switch on your A/C and blower.
>if noise/grinding sound coming from the engine as you turn on your aircon, it could be
your compressor assy or just the bearing of your compressor.
magnetic clutch has bearing in the middle.
>check also any defective idler bearing where ALT/AC, WATER PUMP belts seats
>check also alternator bearing.
for noise inside:
check the blower assy especially the blower it self..
Wiki User
∙ 14y ago
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