Defrost wont blow heat

Courchained

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Jul 12, 2021
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Wisconsin
My floor and body vents blow hot but when switched to defrost no heat os present. I do have air flow but no heat. I'm thinking this is an actuator/door issue. This is a new issue after heater core replacement. Anyone have any input? FYI it's a 98 k2500 5.7 ecsb
 

Courchained

Newbie
Joined
Jul 12, 2021
Messages
34
Reaction score
37
Location
Wisconsin
Update. Removed lower hvac cover and found heater core not securred to housing causing poor heat flow.
 
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