Question about 1986 Mercury Sable

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No heat in the dead of winter please help! I was tricked i was a walking target. i did not do any research was running late did not check with a mechanic of my own. can you please help me.

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Hi, lazzieb2000. There are probably cars that do this electronically now, but usually the knob or slider that regulates hotter and cooler is connected to a wire in a sleeve, the other end of which opens and closed (respectively) a valve that regulates the amount of (hot) coolant that passes through the heater core.

If that wire is not connected, well--because it's bent--or at all, with the valve, you will have no heat.

In most cars, you have to stand on your head and look up under the dashboard to see this stuff. But if you can find the valve (usually black plastic with a silvery arm on it) and move it by hand and thereby create heat, you've found the problem.

Good luck.
Ken

Posted on Dec 22, 2008

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Posted on Jan 02, 2017

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I have a 1994 Isuzu pickup 2.3l. Over heating changed water pump and top hose and now the fan stops whene I put a rolled up magazine in it. But I also suspect the intake manifold gasket


oVER HEATING HAS
Many causes, not 2 like in your post over 10
and many symptoms not just 1. in most cases.
its not a gasket,
what makes you think its overheating
1: steam? go that?
2: engine power loss and ping.?
3: gauge told you ? in cluster, some lie , is yours fibbing (tests)
4: water blasting out the side fail tank (expansion tank>?)
5: leaks to ground>?
6: leaks to passengers toes, heater core or its hoses there leaking.
7: over heats only parked, ??????????????
8: fan dead. (that newspaper trick not a real test) many fans are RPM operated, not simple heat locked, as you think. we use RPM optical meter to test fans.
causes.: lots.
A: thermostat bad, they last about 6-7 years and die all do.
B; RAD cores blocked, we use a $15 IR thermal gun aimed at all tubes top/bottom, and find dead tube with no effort at all.
C: pump bad, no its ok , its new.
D; fan belt slips.
E: fan dead, but would not over heat moving fast. so....
F: junk and crud packing a/c front of RAD, condenser, or RAD.
G:engine block full of MUD, from zero service and flushes in 20 long year.
H: cam belt slipped now timing way off, and huge heat load from poorly burning fuel (and late)hits cylinders walls, x4 and huge heat load on the water jackets and with 1 weak item above, pushes said camel off the cliff, is sparking timing right if not cam slipped a 1minute test with any timing light every made.

and more, lots more,
not running 50% AF?
running pure water> omg

Mar 10, 2017 | Isuzu Cars & Trucks

1 Answer

Heater doesn't heat when cold


Chances are it is indeed the heater core as even a spent heater unit will blow hot air off the engine when the ambient temps are hot . When the temps drop, the heat from the engine block is not enough to heat the cab properly. Have you tried the old cardboard in front of the radiator trick? Speaking of semi's,ever notice they cover their radiators in the winter? That's because it helps get their block temps up a little higher and assists with heating as well. It's not much help but do the buyer a favour and let them know beforehand. Have a good one. :)

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Connie this sounds like your thermostat in the engine is stuck open not letting the water stay in the engine block to heat up. The fix is to replace the thermostat with a new one that will allow the water to stay in the block to warm up. The typical symptoms of a stuck open thermostat is that the air will blow somewhat warm but never hot in the winter time, but it will take a few miles for the air to warm up at all. I would check with the dealership and find out what degree thermostat to replace it with. I run a 180 degree in the summer and a 195 degree thermostat in the winter just to have hot heat in the winter. I hope this helps

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1989 chev g30 heater fan is blowing yet no heat is there a a switch?


Check the antifreeze for temperature protection.Have you changed it lately? Without proper mix in the winter,it will only blow cold air.
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My car is overheating. I checked the thermostat, and it appears to be functioning properly. I checked the fan and it runs when the engine starts to heat up. Shortly after heating up I notice that the...


Hello, sbogs105 and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your
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Get more great money saving tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

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My car continues to overheat even after taking it to engineereing services for repaires on the cylinde head. the heating problem starts when i travel long distances yet my cooling fan is in working order...


Hello, cfish630 and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your
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Thanks for the vote, and good luck!

Oh, here are some cool money saving links, if you are interested:
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How often do i need to replace my fuel filter?


SIMPLE MAINT SCHEDULE , IS CHANGING IT ONCE A YEAR, but it depends where you live, If this truck is a diesel & you live in a northern climate, change your filter once a year but not until you know for ceretain that you are buying winter grade fuel, ie: nov
Reason for this is that there will be wax/parafin build up in the filter that your ran on the summer fuel, it can congeal in the filter in winter becasue of this build up. If you replace the filter in late autumn, then tat filter will not have a congeal problem because the there hasnt been anything but winter grade fuel through it, , and its safe to run all next summer , but the summers residue will cause problems next winter , so change again in late autumn .

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