1978 Oldsmobile 88 heat problems

1978 OLDSMOBILE 88
116,000 MILES
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WILLIAMDERRICK
  • MEMBER
  • 1 POST
i have replaced heater core and therostate but the heat will not come inside car onle cold air comes in but it only blows on floor . the heater controls will not change heat to cold or vise versa slector from defroster to vent
will not work onle blows on floor.
Oct 7, 2013 at 6:51 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are not both hot, see if it has a water valve and if it's operating. If no water valve, look for a cable under the dash controlling an temp blend door.
Oct 7, 2013 at 7:31 AM
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