Temperature Lever
This lever sets position of blend-air door to direct flow of air through heater core (HOT position), around heater core (COLD position), or mixture of both (modulated temperature between full HOT and full COLD).
This lever sets position of blend-air door to direct flow of air through heater core (HOT position), around heater core (COLD position), or mixture of both (modulated temperature between full HOT and full COLD).