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I installed my new thermostat and it doesn't seem like the heater in the car is getting warm. I let it run for about 10 minutes. Is this a concern?

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  • Don Harris Apr 10, 2014

    you didnt say what year model the car was but if it is a 1996 or newer then it could be a concern.the computer that controls the cars systems requires a certain temperture to control fuel deivery to the injectors and if the engine isnt getting warm enough them this would result in poor engine performance.



1 Answer

Only to you--- if you want heat

Find out what controls the hot coolant
from water pump to heater core & back

Posted on Nov 30, 2012


6 Suggested Answers

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Posted on Jan 02, 2017

  • 76 Answers

SOURCE: The heating does not get warm when the car is stationery

try a new thermostat it sound like the problem.

Posted on Feb 08, 2009

  • 1280 Answers

SOURCE: fluctuating engine temp a/c sends out cold air intermittently

Here's the thing. The ECU will shut down AC if the engine temperature is too hot. If the coolant temperature sensor is malfunctioning (lying to the ECU) telling it that the temperature is hotter than it actually is, the computer will turn the AC OFF.

Posted on Sep 12, 2009

  • 4369 Answers

SOURCE: 98 expediton heater puts out warm air only

I would say blend door is not working.

Manual A/C
The manual climate control system heats or cools the vehicle interior depending on the function selector position and the temperature selected. The function selector position determines heating or cooling and air distribution. The temperature blend control setting determines air temperature.
The manual climate control components are used to:

  • select air inlet source (outside or recirculated).
  • select blower motor speed.
  • select discharge air temperature (temperature blend).
  • select discharge air location (defrost, panel, floor).
  • select A/C compressor clutch operation.
Actuator —A/C Electric Blend Door Removal and Installation
All vehicles
  1. Remove the front seats. For additional information, refer to Section 501-10 .
Vehicles with center console
  1. Remove the center console. For additional information, refer to Section 501-12 .
Vehicles without center console
  1. Remove the floor duct panel.
    • Remove the pin-type retainers and release the expander clip.
All vehicles
  1. Remove the LH and RH scuff panels.
  1. Remove the RH and LH cowl side trim panels.
  1. Pull back the carpet.
  1. Remove the pin-type retainer and the rear footwell duct.
  1. Remove The RH instrument panel brace.
  1. Remove eat LH instrument panel lower nut and position the brace aside.
  1. NOTE: Rotate the vacuum control motor to disconnect the vacuum control motor rod from the panel/floor door.
    Remove the panel/floor vacuum control motor.
    1. Disconnect the vacuum lines.
    1. Remove the screws.
    1. Slide the rod out of the door and remove the panel/floor door vacuum control motor.
  1. Remove the floor duct.
    1. Remove the two screws (one each side).
    1. Remove the floor duct.
  1. Remove the temperature blend door actuator.
    1. Disconnect the electrical connector.
    1. Remove the screws.
    1. Pull down to release the actuator shaft and remove the temperature bleed door actuator.

Posted on Jan 08, 2010

  • 31 Answers

SOURCE: The car is 2003 Impala. Heater takes forever to

common impala problem friend of mine has a 2000 with the same problem just cover the grill so that cold air does not blow into the rad it should give you your heat back

Posted on Jan 12, 2010

  • 34 Answers

SOURCE: 89' honda civic lx dies after 10 minutes or warms up?

it is probably your distributer. It has a internal amplifier and when it gets hot, it quits working.

Posted on Oct 31, 2010

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1 Answer

2009 Mercury Mountaineer, my heater wont work unless I'm driving and get over 50 mph... I let my car warm up for 20-30 minutes and it wont defrost my windshield, it only blows cold air.

i would check the thermostat,i think its stuck open the coolant is running cold so you should install a new thermostat with higher degree.

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2001 ford winstar top radiator hose stays cold, even close to the thermostat area i can hold on to the housing after the car has ran for 30 minutes, heater blows luke warm to warm at times, but not...

Check the heater hoses for warmth at the heater core. Some designs do not use a waterflow valve, but instead always have heater core flow and use the air flaps to regulate heat.

Now there is a difference in some thermostats and the housings. Barely noticeable are the locking tabs inside the housing and on the thermostat ring. If you have this setup and the thermostat is not locked in place, you could get some bypass around the thermostat.

If you have an electric cooling fan, the Relay may be stuck, keeping the electric cooling fan running when it should not. This would overcool the engine.

Please rate my info.

Mar 08, 2013 | Ford Windstar Cars & Trucks

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Why doesn't my car get up to operating temperature?

Well the first question would be what does the temp gauge on the dash show after you have run the engine for 5 or 10 min ?
If the gauge is in the middle of the temp range the engine is getting hot and either the heater core is stopped up or you have a problem with the blend door under the dash.
If the temp gauge is staying around the cold mark the thermostat is not closing to warm up the engine.
I am assuming the radiator is full of coolant.

Jan 28, 2013 | 1997 Ford Thunderbird LX

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Engine temperature gauge low

I would suspect the thermostat first.

Aug 17, 2017 | 2002 Dodge Grand Caravan

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Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot

disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

May 08, 2012 | 1995 Toyota 4Runner

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2000 malibu runs hot if not warmed up

How do you know it gets hot? Are you going by the temperature gauge on the dash? Or have you checked under the hood and found out the engine really is running hot? ...Reason I ask is, something just doesn't sound right in your description. After just 5 minutes from starting and driving away, the engine would not yet be at normal operating temperature. That would explain the heater not yet warm. But the temp. gauge says hot?
If so, I would replace the temperature sending unit on the engine. the one for the dash gauge, and see if that was the problem-not reading the temp. accurately.
Couple of other things: Are you sure you got all the air out of the coolant system? Start the car with the radiator cap off and let it run until the engine is warmed up fully, then shut it off and install the cap. Does your reservoir tank stay about half full where it should be, between the full-hot and full-cold marks?
If your problem persists. I would have the coolant system pressure tested, and see if you could get a true temperature reading of the coolant when it seems to be running hot.
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1 Answer

Why isn't my heater in my car getting warm

There could be several reason. The water pump could be weak. The radiator could be low on Anti freeze. The control valve on the heater line from the motor could be malfunctioning. The thermostat could be bad. You may even have an air bubble in the system that is causing the problem. The only way to be sure is to test each are. Check the fluid level and make sure it is good then run the vehicle till it warms up. With the vehicle running and warm locate the control valve on the hose running from the motor or radiator to the firewall, there are two. One will have the valve on it. You can open this valve manually and see if that allows the interior to warm up. If it does then the controller and vacuum lines to that valve. If it doesn't then remove the thermostat and see if that resolves the issue. If that doesn't resolve the issue replace the water pump.

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Overheats after 10 minutes

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