Question about 2007 Mercury Mountaineer

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The heating system intermittently blows hot and cold air and the temperature gauge will show overheating, then the guage will go back to normal. It may be the thermostat but I am not certain. thank you. denny

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  • 113 Answers

You most likely have an air pocket in the cooling system. You'll need to bleed it. The coolant sensor is designed to monitor coolant not steam.

Posted on Nov 21, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

onyeredson
  • 404 Answers

SOURCE: heater only blows cold air but hoses are hot

Hi!
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
Please press the Blue button to appraise my FREE Efforts, Thank You!
Paul 'W' U.K

Posted on Mar 01, 2009

rockitman187
  • 2559 Answers

SOURCE: 97 Grand Marquis Erratic Temp

Sounds like the thermostat may be sticking,Or the temp sensor is going out.Both very inexpensive.

Posted on Jan 10, 2009

  • 99 Answers

SOURCE: Temperature Gauge Stays Cold on 2005 Sable

look on the intake it should be there

Posted on Jan 26, 2009

gordanddar
  • 477 Answers

SOURCE: temp guage showing hot, not getting any heat for 1992 Mercury Cap

If the hoses to and from the heater core are hot , and you say the heater core is hot , then the only answer is that the air duct that flows into or out of the heater core plenum ( housing ) is not opening.
Heater control on dash borad inoperative.
Not sure about 92 capri , some cars have a cable linkage , some work on vacume motors.
Try to find a haynes manual for your car , they will walk you through almost every step of anything you may ever want to do to your car.

You seem to know what you are doing , but I gotta ask ........the heater core you felt was up behind the dash inside the passenger compartment of the car right ?

Posted on May 10, 2009

  • 65 Answers

SOURCE: ac blows hot air

If your a/c blows only hot air you need to have it charged. Hope this helps to get you cool

Posted on Jul 24, 2009

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Check out related help links with solutions to troubleshoot the problem:---
Click the link below:---
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These details will help.
Thanks.

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1990 dodge dakota 2.5 over heats temp gauge erratic


For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----

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1 Answer

My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...


Air pockets will make the guage do that, and also cause your heat to come and go. Also, a poor radiator, as in rotting, or plugged up, will cause high temperature issues.

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1 Answer

2000 Elantra Overheating


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4 Answers

Heater blowing cold air


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