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Residual heating

Old 12-11-2018, 01:13 AM
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Default Residual heating

Discovered the other day that if the car is off and you hold down the fan button for a couple of seconds the car will be heated with the residual heat from the coolant for an hour. Not tried it for that long but I have used it a few times when I've driven somewhere, got out to do something for 10 - 15 minutes and left it on (with the car off and doors locked) and come back in and it's still nice and toasty and blowing warm air. Nice little feature that some other folks might not know about.
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Old 12-11-2018, 04:26 AM
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Old 12-11-2018, 05:32 AM
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Does this work with the a/c as well?

Will have to try the heat today...being below freezing and all.
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Old 12-11-2018, 05:38 AM
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Originally Posted by Kelzo
Does this work with the a/c as well?

Will have to try the heat today...being below freezing and all.
No it won't work with the A/C as the engine needs to be running to run the compressor. In heat all it does is circulate the hot coolant through your heater core and run the fan all of which can be done on battery power....
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Old 12-11-2018, 05:49 AM
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When you engage the feature, you can also adjust the fan speed. Mine defaults to 3.

It will run up to 30 minutes, so in the interest of battery life I turn my fan speed down to 1 if it's going to be running for the entire cycle. Still keeps the car toasty!
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Old 12-11-2018, 08:57 PM
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Great tip everyone. Tried it today while waiting in drive through lane at pharmacy. Works like a charm.
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Old 12-12-2018, 05:31 AM
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Nice tip. Thanks for posting.
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Old 12-14-2018, 03:22 PM
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Best tip of the year. Thanks!
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