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4th Gen T4Rs
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https://www.toyota-4runner.org/4th-gen-t4rs/)
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'03 No Heat
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https://www.toyota-4runner.org/4th-gen-t4rs/307338-03-no-heat.html)
| Ducksrus |
09-16-2022 05:28 PM |
'03 No Heat
Have an '03 where the heat does not come on. Both lines to the heater block are hot, coolant level is fine, T-stat appears to be working properly. A/C works & responds according to the set temp & in all positions of mode control. Do have a humming sound from right side of console that was thinking maybe this is some type of actuator issue & a diverter is not opening for the heat; however, not sure.
Probably time for coolant change, but do not think that is part of the issue & heat was working last winter.
Thoughts?
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| AuSeeker |
09-16-2022 06:18 PM |
Quote:
Originally Posted by Ducksrus
(Post 3759920)
Have an '03 where the heat does not come on. Both lines to the heater block are hot, coolant level is fine, T-stat appears to be working properly. A/C works & responds according to the set temp & in all positions of mode control. Do have a humming sound from right side of console that was thinking maybe this is some type of actuator issue & a diverter is not opening for the heat; however, not sure.
Probably time for coolant change, but do not think that is part of the issue & heat was working last winter.
Thoughts?
|
Very possible that the "Blend" door actuator is not working correctly and stuck in the AC position.
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| Ducksrus |
09-16-2022 07:20 PM |
Pulled some panels off & found a small motor on side of HVAC unit where the humming sound originates. Not sure that is the issue, but have pic/video of what is going on & will try to find a parts diagram & replace the part, I think. Not much room under there & do not see much of how the motor is mounted.
Thanks
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