Not heating up

Asked by Planetwatcher Jan 01, 2018 at 04:59 PM about the 2006 Toyota Sienna XLE Limited 7-Passenger

Question type: Maintenance & Repair

Just took my 2006 Sienna on a long winter trip.
Thermostat housing failed and was replaced.  Days
later when it was 20 below zero,  it comes halfway
to operating temperature when parked idling. But
as soon as it gets on the highway, engine temp
drops to bottom, and there is no heat inside.

3 Answers
101,565

KenF answered 6 years ago

Check the coolant level? What coolant did you use - is it rated for this sort of extreme cold? Get all the trapped air out of system?

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