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No heat at idle

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Old 10-31-17, 08:24 PM
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jones101
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Default No heat at idle
I didn't notice this last winter....
With the engine at operating temp I do not get warm air from any setting or blend UNLESS the car is rolling.
RPM does not seem to affect it. Road speed - even 5 MPH - seems to be the only thing that allows me to get heated air to come from the vents.

I did some searches but could not find anything to shed light on this strange new symptom.
I have some time left on my warranty, but the dealer is 100+ miles away. Any advice?
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Old 10-31-17, 08:28 PM
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roadfrog
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Have you checked your coolant level? If it's low (even a little), it won't heat. Your symptoms are classic of low coolant.
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Old 11-01-17, 09:40 AM
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Is your interior fan working?
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Old 11-01-17, 10:06 PM
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Dang-
Added about 2 pints of fluid and now have heat. Thanks!
I guess RPM does indeed have an effect.
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Old 11-02-17, 09:38 AM
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Keep an eye on it for a few days as the level will drop as bubbles are evacuated from the system, don't want the same problem a week from now.
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Old 11-02-17, 02:44 PM
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Originally Posted by jones101
Dang-
Added about 2 pints of fluid and now have heat. Thanks!
I guess RPM does indeed have an effect.
That's what I figured. Common issue. Now.....where is the leak? In my case, it was the water pump. They are failure prone.
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Old 03-03-19, 02:18 AM
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Originally Posted by jones101
I didn't notice this last winter....
With the engine at operating temp I do not get warm air from any setting or blend UNLESS the car is rolling.
RPM does not seem to affect it. Road speed - even 5 MPH - seems to be the only thing that allows me to get heated air to come from the vents.

I did some searches but could not find anything to shed light on this strange new symptom.
I have some time left on my warranty, but the dealer is 100+ miles away. Any advice?
Same issue. Kind of annoying. I shouldn’t have to freeze at every stop light.
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Old 03-03-19, 02:57 AM
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Originally Posted by Sportznuts


Same issue. Kind of annoying. I shouldn’t have to freeze at every stop light.
did you not read the solution?
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Old 03-03-19, 05:57 PM
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Topped it off with the fancy red stuff from the Toyota dealer every 6 months or so and all is well. Only took 1/2 cup or so.
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Old 03-03-19, 06:32 PM
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Originally Posted by jdanielca


did you not read the solution?
oh. I didn’t see it. I do now. Thank you.
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Old 03-03-19, 06:49 PM
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Originally Posted by sportznuts


oh. I didn’t see it. I do now. Thank you.
👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
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Old 03-04-19, 11:22 AM
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I am so happy I saw this thread. I had the same problem and I added coolant and it resolved my problem as well.
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Old 03-04-19, 02:47 PM
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Low coolant was definitely the issue. Also, don't forget to burp it as Toyotas are known to get air in their system. That'll significantly help as well
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Old 03-04-19, 05:02 PM
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I can’t jack the car would burping still work?
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Old 03-04-19, 05:10 PM
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Yes, it will. Jacking it up helps get all the air bubbles out of the system, but you should get most of it out if you can’t
Last edited by nickderosa; 03-05-19 at 03:23 PM.
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