My 1998 Discoa/c blower keeps turning off momentarily on speed 4(high).

Jiggling the switch fix's the problem. However the problem has gotten so bad over the last few months I have to jiggle the switch every 30 seconds or shove something aroundthe switch to help it make contact.

I amalways using the fan on speed 4 (high). Speed three does not work at all. The rest of the speeds work but not enough air flow here in California.

I see some similar post on the forum, but no resolutions yet. I'm thinking about either replacing the control panel $190 or resistors/relays. Any suggestions? Thanks

 

Its time to get a new switch.

 

"DITTO"!! Unless your year had separate resistor packs, cause they can also cause your problem.
None of the fan motors are designed to run high speed over long periods, just burns up the works.