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Ask Toyota Service Your Own Question
Toyota Service
Toyota Service, Toyota Expert
Category: Toyota
Satisfied Customers: 4818
Experience:  30+ Yrs of auto experience, Award Winning Svc. Manager; Just Answer Customer's Choice Award Winner
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My 06 Sequoia is giving me issues with the heat, I turn it

Customer Question

Customer: My 06 Sequoia is giving me issues with the heat, I turn it on and it blows cold, until I begin driving. I've messed with the knob- you can hear when it clicks to AC and when it clicks to heat so it's not a knob issue. Did smell antifreeze though this morning after it wasn't working
JA: Thanks. Can you give me any more details about your issue?
Customer: My name is Ali
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Submitted: 1 year ago.
Category: Toyota
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. If you smell antifreeze, you have a coolant leak. On these engines, the water pumps are notorious for leaks at the seal where the impeller shaft is. When you have a coolant leak, you have air entering the system. This air takes the place of the lost coolant. When the coolant level is a bit low, the first thing that does not get enough coolant flow is the heater core. No hot coolant in the heater core = no heat to the interior. I would get the coolant small diagnosed as soon as possible. If left unattended, your engine might overheat (do to loss of more coolant) and you will end up with a very expensive repair bill. The recommendation I have for you on this request would be to have the water pump (and the engine room coolant hoses) inspected for leaks. Also check the radiator. You may not see a leaking radiator pinhole when the engine is cold, but it may seep when the engine is hot. Have the cause of the coolant odor rectified. This should fix the no heat condition.

Expert:  Toyota Service replied 1 year ago.

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