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Mira-cool mrcacl intertek 3059966

Need to find manual or info on why when on heat the air is cool on the other side getting to flows when I need only HEATER

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2005 Pathfinder Heat Flow problem

I am having/had the same problem. My rear heater has not worked the last 2 winters, still trying to figure that one out. But I think I solved the front heat problem myself. The heater was blowing cold air while idling and hot air when the car was moving.

I jacked up the front of the vehicle, took the cap off of the reserve tank for the radiator, turned the car on and ran the heat (AC off) for 15 minutes. This is supposed to release any air bubbles in the coolant system and I did see air bubbles emerge as I was watching (this might be normal occurance, I'm far from a mechanical expert). Anyway, this did not immediately solve the problem, still blowing cold air as it sat there idling after 15 minutes. Dejected, I put the cap back on, lowered the vehicle and resigned myself to taking it to a dealer.

But a funny thing happened the next day, the coolant level was a lower (no leaks on the floor) so I filled up, and sure enough, when I started the car and let it warm up a little, hot air started coming out of the heater!!!

As far as my wife knows, I fixed the problem for the price of a bottle of coolant, so I am a hero...but at first I thought it didn't work. Here we are a month later and still blowing warm air and haven't had to replace any more coolant...the internet is a wonderful thing!

Hope this works for you, and I hope I can figure out my rear heater problem as well.

Posted on Jan 30, 2009

  • 335 Answers

SOURCE: air conditioner works fine on both sides but

Hello and welcome. this is caused by a bad temp door actuator for the drivers side temp door. it is stuck on cold. the temp door actuator will need to be replaced to repair this concern. here is a picture. it is mounted to the drivers side of heater a/c case, behinde the dash.


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Posted on Sep 21, 2010

duane_wong
  • 6826 Answers

SOURCE: Bought my jag late Spring,

The blend door(s) is (or are) not functioning correctly.

Here are instructions on how to remove and replace the various blend door actuators:



Re-Circulation Blend Door Actuator


  1. Remove the glove compartment.
  2. Remove the recirculation blend door actuator retaining bolts.
  3. Disconnect the recirculation blend door actuator electrical connector.
  4. Remove the recirculation blend door actuator and disconnect the control rod.
  5. To install, reverse removal procedure.


Instrument Panel Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the glove compartment.
  3. Disconnect the electrical connector.
  4. Disconnect the instrument panel blend door actuator remote linkage.
  5. Remove the instrument panel blend door actuator retaining bolts.
  6. Remove the instrument panel blend door actuator.
  7. To install, reverse removal procedure.


Defrost Vent/Register Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the instrument panel.
  3. Disconnect the electrical connector. Remove the defrost vent/register blend door actuator.
  4. To install, reverse removal procedure.


Footwell Vent/Duct Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Reposition the in-vehicle temperature sensor venturi pipe.
  3. Disconnect the electrical connector.
  4. Remove the retaining bolts.
  5. Remove the footwell vent/duct blend door actuator.
  6. To install, reverse removal procedure.


Cold Air Bypass Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the driver side instrument panel lower trim panel.
  3. Disconnect the cold air bypass blend door actuator electrical connector.
  4. Remove the cold air bypass blend door actuator retaining bolts.
  5. Remove cold air bypass blend door actuator.
  6. To install, reverse removal procedure.

Posted on Oct 23, 2010

  • 147 Answers

SOURCE: 2008 Chevy Uplander has 21,000 miles. Nno heat

Uplanders with the 3.9 engine are prone to no heat at idle speeds. Probably weeping head gasket. Air bubble trapped. Dealers will remove rad cap and let it sit at about 25 deg. angle for a couple hours. Good for awhile.

Posted on Nov 23, 2010

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1 Answer

Why is it blowing warm on and off on the driver side and blowing cool on the passenger side?


Here's is a little background and a couple of thoughts. Turning to the background, first. The heater/air conditioner system in your 02 uses the same set of ducts located in the instrument panel. In turn, those ducts are linked to what can be considered miniature version of the cooling system in the engine compartment (yes, this is a greatly simplified version). The whole system, in fact, is run off the main heater/ac system, however, it has a separate series of controls so that it can function properly.

When you dial a temperature, a signal is sent to the heater/cooling system telling the system to open a series of baffles, directing a flow of heated or cooled anti-freeze/coolant to the proper "radiator" behind the face of the instrument panel. In turn, the fan system activates a series of doors behind the instrument panel so that the flow of air is directed through the "radiator" and into the passenger compartment. This is essentially the heater/cooling system work.

Now, you say that the driver's side is hot, while the passenger side is cool. What has happened is that the flow of heated coolant that is supposed to heat the passenger side of the duct system is blocked. Since there is no heat to warm the air that is flowing past the fins of the "radiator," the flowing air remains cool to cold, depending on the weather and ambient temperature. The result is that one side of the car remains cool. And, since the other side of the "radiator" is normal and the air is heated, it is warmed.

That is the most likely explanation for this.

Another possibility is that the baffles themselves are stuck and the coolant that is supposed to be directed to the passenger side is not being directed their.

Either way, your technician has some work ahead.

Jun 05, 2015 | 2002 GMC Envoy XL

1 Answer

Heater not blowing hot air


when you operates the heater button worm water of your engine's water jackets enter to the evaporator locates inside your A/C blower & air flows through it & air becoming worm. Therefore I proposed you to check your vent linkages for vent doors inside the blower unit.

Nov 24, 2013 | Land Rover Range Rover Cars & Trucks

1 Answer

Rear vents blow out hot air when a/c is on


Keep this principle in mind: Heat, flows INTO cold... When you hold an ice cube in your hand, your hand gets cold because the heat from your hand is flowing INTO the clod ice cube, NOT because the cold is flowing into your hand.

On this particular vehicle (like many modern vehicles), hot water from the engine flows through the heater core at all times, even when you have the A/C on or when you have nothing (A/C, heat or vent) on. The system uses a door that closes down over the air opening to the heater core to keep you from feeling warm/hot air when it is not desired. The reason(s) you feel that the vent air is warm even when the outside temperature is somewhat cool is/could be caused by the following:

First, although as mentioned above, the heater core is restricted from receiving air when you are not commanding heat by the control panel, the heater core ultimately ends up as warm as the engine temperature. This is generally somewhere around 200 degrees F. Because all the air coming out of your vent(s) must pass over the door that restricts air over the heater core, and because the heater core gets so hot, some of that heat is picked up by air passing over the hot door even though it is closed.

Second, the door that restricts airflow from passing over the heater core has a seal around it. After a period of time this rubber (or usually felt) seal deteriorates, allowing some air to actually pass over the heater core. Since the core is hot all the time, some of the air gets heat loaded, producing warmed air.

Third, the door is operated by (in the case of your vehicle) an electric motor which responds gradually/proportionately to the setting you select on the temperature dial. If the motor gets out of calibration (can happen from time to time), if the control head has a 'glitch' and sends an incorrect signal (chronically, usually), or if the electric motor (called an actuator and contains its own little electronic 'brain') becomes faulty, the door may not be closing completely. This symptom can also be caused by a problem with the door itself, where the door gets stuck due to warping of the plastic case, a foreign object preventing it from closing (usually a pen or toy dropped into a vent or defrost opening), or a broken or cracked door hinge.

Last, the vent intake opening, where the 'fresh' air comes into the car on the 'vent' setting, is located just below the windshield on the passenger side. This opening receives its air directly off of the sun-baked, engine-heated hood and because of this the air is never as cool as outside air even on a cooler night.

I hope this answers your question. Many domestic vehicle manufacturers have begun installing heater control valves on their vehicles once again as they nearly all used to have. Note that the fix for most everything I have mentioned here requires removal of the dash of the vehicle or replacement of the control head and therefore is in many cases not worth the investment if it is not an extreme problem (for example, unless the system is stuck on full heat in the middle of summer. Additionally, remember that, if you so desire, manual shutoff valves can be placed in the heater hose lines (please consult a qualified mechanic as water from a vehicle can and will scald and burn you!), allowing you to manually shut off the flow of water into the heater core, thus reducing some of the heat (Readers note that certain foreign vehicles REQUIRE water flow through the heater core at all times for engine cooling and are not candidates for this procedure!).


Parts Of BMW.

May 30, 2012 | Cars & Trucks

2 Answers

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

1 Answer

Heat stops working. No heat from heater on my 1999 S10 V6.. I have "burped the cooling system after which I get plenty of heat but eventually it stop working after driving 2-3 days. Should the heater...


Air is getting into the system. Tighten all hoses and do not overlook the hose going to the expansion tank. When car cools that hose sucks water back into system but if not tight it will suck in air. Could be why you constantly have to "burp" the system.

Jun 13, 2017 | 1999 Chevrolet S-10 Pickup

1 Answer

Heat does not come out passenger side of the car but comes out drivers side


There is a blend door problem.

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prev.gif next.gif HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

Oct 28, 2010 | 1998 Oldsmobile Regency

3 Answers

My heater does not and there is no wet spot on the floor board. I just changed the thermastat. Do you have an idea if what it could be?


sometimes these are a real pain to bleed. double check your cooling resevoir and top off as neccessary. once you have done that, rev the engine to about 2000rpm's while the heater is on. this will help bleed the system also and you should feel heat rather quickly. the running temp on these engines is around 220 degrees farenheit. happy holidays

Dec 30, 2009 | 2005 Chevrolet Impala

1 Answer

2005 Chevy Impala driver's side heat blows cold, but works on passenger side. Was told a vent is probably not opening to allow for the heat to get to the driver's side? Where can I locate this vent?


First....buy a drivers side air flow actuator at a auto parts place for dual zone heating/cooling.
(NAPA etc will have it.....or the dealer)
Open the glove compartment.....all the way....you may have to take the screws out at the bottom......look in at the heater assembly....look over to the left....you will see the two air flow actuators.
Look at the part you have and match it to the part on the heater assembly.
The actuator that is closest to the engine is the drivers side control.
Replace it.
Try your controls and check for heat and cooling on both sides.
The stepper motor in these actuators goes bad on quite a few...but over look that.....you have a great car,good for many miles of trouble free driving.


Nov 03, 2009 | 2005 Chevrolet Impala

1 Answer

The heater is only working on the passenger side in my 2005 impala. the driver side is blowing cold air. please help


Do you have dual zone heat and cooling controls?
If so......the drivers side air flow control unit on the heater assembly is not working.
It is mounted on the heater assembly and can usually be accessed through the glove compartment to change it.
The stepper motor on these units fails often.
This should be the problem on your car 99%...if you have a separate heat/cooling control for driver and passenger areas.

Oct 29, 2009 | 2004 Chevrolet Impala

2 Answers

When puting heater on cool browing hot air


There is a door attached to the cable behind the levers on the heater controls. The cable goes to the heating unit under the dash to a trap door that is supposed to move. You will want to look to see that the cable is attached and moving the lever on the side of the blower box under the dash. If its not moving, move it manually and see if you get temperature change to cool. Probably, your heater is stuck on and hot air is being carried over the heater core and into the vehicle. You need to close off the door that allows the heat into the vehicle and then trace the cable back to the lever to find out where the problem is. Maybe a broken or disconnected cable or improper closing heater box door.

Aug 15, 2009 | 1988 Ford Festiva

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