Dayton model 3e375 fan/themal switch

SOURCE: cooktop fan switch replacement

1. Turn off the power at the breaker box.
2. lift off the air grill.
3. remove the two screws at the front of the control switch panel (escutcheon)..
4. slide the control panel forward until it disengages, then lift up to expose the switch assembly and wiring.

SOURCE: Dayton blower fan repeatedly kicks on and off

chech the air filter is clean and the fan limit switch look to change fan limit

SOURCE: Broken ceiling fan switch

home depot, Ace, true value cary rhem, probably better quality, doesnt sound like the one aloha uses are very rugged

SOURCE: 01 grand cherokee fan relay/oil pressure

I don't know if this will help anyone, but i had a issue with my jeep running hot and check engine light coming on as well. After alot of trips to different shops - the last one found that there were two senors in the engine for the fan that need to be changed. Everyone would aways fine the one up top but not the second one. After that, have not had any other problems like it since.

SOURCE: removal of heater fan switch on dash.

Chances are it is in fact not the switch. These systems are wired so that at high speed setting battery power is connected directly to the fan. However lower settings switches through a set of resistors. These are mounted on a circuit board which in your case is mounted on the firewall on the passenger side of the vehicle under the wiper. Check this before you turn the control panel into a heap of spares on the garage floor.