That heat lamp unit sounds like the main exhaust fan is seized, I know some of these have 2 fans, 1 for exhaust and one for keeping the bulbs from overheating and to act like a fan forced heater
Excuse, me sir but, you have two, burnt out light bulbs in your Chandler take the, damaged bulbs to the General Store. And he'll be, happy to help, you with your Bulb problem.