How do I get my heater to blow thru vents?

Asked by GuruJKD2S Aug 04, 2020 at 02:12 PM about the 1988 Chevrolet S-10 4WD

Question type: Maintenance & Repair

I have 88 s10 blazer heater only blows thru vents any ideas
what to do

2 Answers

27,460

Are you saying it won't blow defrost or it won't blow on the floor? are you saying it won't blow front dash vents? I'd have to check directional doors, under the dash. If an actuator door is vacuum controlled, I'd have to check that. Just my opinion.

1 people found this helpful.
157,505

If it will only blow through the defrost vent, the system has lost vacuum. Look for a disconnected vacuum hose at the firewall. Hope that helps! Jim

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