Ah Ha! That suggests a loose electrical connection. Or prossibly a relay contact problem. Check the schematic diagram for you auto and see where the connectoins are for fan motor blower connections and unseat them and reseat them. Or, if that does not work, check to see if maybe one of the relays behind the passenger's right kick panel fuse+relay+circuit breaker might be 'un-happy' by interchanging the blower motor relay --IF IT IS ON THAT SIDE-- with another of the SAME size and type. If the 'fault moves with the relay/fuse/circuit breaker, replace the 'bad' one. And, of course, FIRST check that if it is a fuse that the fuses contacts are CLEAN (try a #2 pencil eraser gentely on them to clean off the tarnish. Which it most likely will NOT be, but is worth a try.
Alternatively, if you find a suspect relay, gently remove the cover and check the contacts for very low resistance on both the NO (normally open) and the NC (normally closed) contacts, if good, replace the cover. If VERY careful and have the correct type of 'clearner' paper, 'gently clean the relay contacts IF they are discolored'. Or if swapping relays lets the blower motor run normally, replace the relay with a new one.
Monday, March 22nd, 2021 AT 12:05 PM