2001 Chevrolet Silverado 1500 Pickup Support Question
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Question posted by the3brocks on November 20th, 2015
Defroster Not Getting Hot
Current Answers
Answer #1: Posted by TechSupport101 on November 20th, 2015 11:42 PM
Answer #2: Posted by kader001 on November 21st, 2015 12:43 AM
The vent system is primarily switched by vacuum. Maybe one of the lines has become disconnected or the defroster door/cylinder is stuck.
Does your car switch between FLOOR and VENT and MIX properly? If not maybe your primary vacuum line going to the HVAC control isnt hooked up. There should be a line for that in the engine compartment that goes from the main vacuum tree into the firewall.
The Defrost setting works in conjunction with the A/C compressor. The A/C system will dehumidify the air prior to send it thru the Heater core and up to the windsheild.
Your defroster would work better if your A/C was also working.
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