Recently my Buick has started overheating while stopped at long lights or idling in neutral. When this happens, I do not hear any fans running to cool the engine. The problem is intermittent, because I do hear the fans turn on at other times and the engine heat warning light does not come on. I have visually verified that the fans are working at times. I have also run the car in neutral and watched as the heat lamp came on without any fans blowing.
I also have intermittent use of the Low, Med1, and Med2 blower speeds for the climate system.
The High blower speed doesn't work at all.
Now, I know that all of these fan systems work under separate relays. In fact I have changed the high speed blower relay previously to good effect.
What bothers me is that, in this instance, all three of the symptoms appeared at once. I suspect that there may be an underlying cause, maybe some part gone bad that affects all three relays/fans.
Do you have any suggestions for parts to test for failures, before I start spending big bucks on a multi-sytem wild goose chase.
I also have intermittent use of the Low, Med1, and Med2 blower speeds for the climate system.
The High blower speed doesn't work at all.
Now, I know that all of these fan systems work under separate relays. In fact I have changed the high speed blower relay previously to good effect.
What bothers me is that, in this instance, all three of the symptoms appeared at once. I suspect that there may be an underlying cause, maybe some part gone bad that affects all three relays/fans.
Do you have any suggestions for parts to test for failures, before I start spending big bucks on a multi-sytem wild goose chase.
Oct 2, 2008 at 5:45 PM
