1997 Mercury Sable Has no heat

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ksukid
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Joined: Sun Dec 16, 2012 12:25 pm

1997 Mercury Sable Has no heat

Unread post by ksukid » Sun Dec 16, 2012 12:28 pm

both heater hoses to the heatercore never get hot.

 

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ProTech
Posts: 657
Joined: Wed Oct 17, 2012 10:08 am

Re: no heat

Unread post by ProTech » Sun Dec 16, 2012 9:48 pm

I need some more information to help you properly!!!

Year, make, model and engine size of vehicle please!

Does the car reach operating temperature normally? Do the radiator hoses get hot to the touch? Have any repairs been made at all?

I can't help you with such little information that you provided.....
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

ksukid
Posts: 3
Joined: Sun Dec 16, 2012 12:25 pm

Re: 1997 Mercury Sable Has no heat

Unread post by ksukid » Sat Jan 05, 2013 11:46 pm

1997 Mercury Sable 3.0 engine

Yes, it does reach operating temperature
Yes, the hoses get hot to the touch
No repairs have been made

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ProTech
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Joined: Wed Oct 17, 2012 10:08 am

Re: 1997 Mercury Sable Has no heat

Unread post by ProTech » Sun Jan 06, 2013 9:32 pm

Ok, so if the car does reach operating temperature, and both the upper and lower radiator hoses get hot to the touch, at least you know that you have flow and that the thermostat must be operating normally.

It seems odd that neither heater core hose gets warm/hot, as usually you would have at least the inlet getting warm. So if both are cold, that means you aren't getting hot flow to the inlet hose, which in turn would obviously not let the outlet hose get hot either.

I would check any heater valves that control flow to the heater core. Sometimes the car can be equipped with a vacuum operated one, or an electric valve. When these valves go bad, flow is limited. If your car does not have one of these valves, I would start to check for any restrictions in the cooling system. You could have a bad hose that has collapsed, or a bad clogged up hose or core.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

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