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Jan 14, 2019 | 07:22 AM

Craig.Parks

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From: Katy, TX

No Heat

'15 EL - No heat from front for rear units. I have changed the blend door actuator already.

Has anyone had the auxiliary water pump fail? I'm asking because before the problem occurred I could hear the coolant in the heater core "whoosh" when the engine started.
I'm not hearing that any longer. Also, I can get heat temporarily while the engine is running at higher rpm (passing on a two-lane for example).

I have tested for voltage at the pump and it's good.
Part # is "FL1Z-18d473-A".

Thanks

Last edited by Craig.Parks; Jan 14, 2019 at 07:54 AM. Reason: found part #

Jan 14, 2019 | 09:15 AM

alloro

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I assume the coolant is full?
Are all of the heater hoses too hot to hold?

Jan 14, 2019 | 09:42 AM

Craig.Parks

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From: Katy, TX

I will check coolant the coolant level.

I'm able to hold both of the hoses near the T and both are just warm. They are never too hot to hold.

Jan 15, 2019 | 10:29 AM

alloro

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Quote:

Originally Posted by Craig.Parks

I'm able to hold both of the hoses near the T and both are just warm. They are never too hot to hold.

Then that's the problem, at 190 degrees you'd never be able to hold onto them. You need to test if your engine is coming up to full temperature.

Jan 15, 2019 | 01:56 PM

Craig.Parks

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Alloro - you hit the nail on the head. Coolant was almost a gallon low. Guess I need to stick to the KISS principle.
The overflow/degas bottle looks like has coolant in it when it really does not.
Heat is working great again. Will keep a much closer eye on the coolant level.

Reps Given.

Jan 16, 2019 | 09:28 AM

alloro

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Quote:

Originally Posted by Craig.Parks

Alloro - you hit the nail on the head. Coolant was almost a gallon low.

Yeah that'll do it, glad it was something simple.

Jan 21, 2019 | 09:02 AM

YoGeorge

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My question would be "where did the coolant go"? You obviously have a leak somewhere and that may not end up being simple...there is NO circumstance under which coolant loss is normal.