While you wait for answers, we may have found some information which could help you.
Click here for Westinghouse Oven 688My Westinghouse 688 freestyle wall oven?
wiring help for Electrolux oven?
fan works, element does not?
How can I fix my Thermostat control for Westinghouse model KB251RDM2 ?
Westinghouse 688 wall oven timer?
Westinghouse Oven 688?