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International Automotive Technicians Network
Re: 2017 FORD SUPER DUTY NOT COLD AT IDLE
Posted to HVAC Forum on 8/14/2023

Are you sure they are in recirc mode?

Many customers don't realize how important this is as the heat load increases.

Also, try pinching off the heater hoses and see if the duct outlet temp drops.

Also, are these crew cab, extended cab or regular cab? Login to read more.