Intermittent Blower Fan

[SLudwig]

This morning the heater blower fan wouldn't come on ... any speed. I figured the relay or fuse had gone out, but during my commute it came on and worked fine, all speeds. Another connector going bad? Where to look?

 

Thanks,

Scott

[Legacy777]

So it didn't work at all, not even on hi?

 

The hvac push button thing is known to have bad solder joints, which causes the flapper door that directs air to do nothing. I haven't necessarily heard of issues with the fan motor.

 

One possibility could be the resistor pack. It's located in the evaporator box right behind the glove box.

[SLudwig]

It did it again this morning so when I got to work I crawled under the dash and began exploring. I found the relay for the fan (which stopped working about this time) and started tapping on it with a wrench. On ... off ... on ... off ... sure enough this was the culprit. I took it out and apart and since everything seemed clean and functioning, the only thing I could figure might be some oxidation on the contact (which I couldn't see the surface of) so I worked on it with some emery then crocus cloth. I reinstalled it and started tapping again and couldn't get it to shut off. Hopefully tomorrow morning (and hence thereafter) it won't cause any more problems.

[Cougar]

Good sluthing SLudwig. Thanks for the feedback. I forget about the relay being in the circuit also. Always want to blame the resistors or the motor for these problems. Tain't neccessarily so.