My front defrost barely blows any air and the air never gets very warm, it takes for ever to defrost the window.
Nov 19, 2017 at 11:43 PM
Defroster (front)
1990 FORD AEROSTAR
BRENDA MCGRAW
- MEMBER
- 16 POSTS
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WRENCHTECH
- ✓ASE Certified Mechanic
- 20,761 POSTS
With the engine at full operating temp, locate the two heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by a cable in this vehicle. The problem can be that the cable has broken or come off. This is what needs to be determined by examining the cable connection and see if it is responding to heat change commands or not.
Nov 20, 2017 at 2:55 PM
WRENCHTECH
- ✓ASE Certified Mechanic
- 20,761 POSTS
This truck should also have a coolant control valve on the engine side that needs to have operation confirmed. Picture below.
Image (Click to enlarge)
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Nov 20, 2017 at 3:00 PM
Thank you, I will check both of these areas out.
Nov 21, 2017 at 1:26 AM
STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
Please let us know what you find. We are interested to see what it is.
Cheers, Ken
Cheers, Ken
Nov 24, 2017 at 6:26 PM
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.