No heater?

Hello,

It sounds like the mode actuator is bad. here is guide to give you an idea of what you are in for when doing the job. Also some of the air doors are power by vacuum so check the vacuum lines under the hood to make sure they are not falling apart.

https://www.2carpros.com/articles/replace-blend-door-motor

and

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

and this guide and video can help as well.

https://www.2carpros.com/articles/car-heater-not-working

and

https://youtu.be/SNRb6pSwYuU

Check out the diagrams (below) Let us know what happens and please upload pictures or videos of the problem.

heater blowing cold air

Turn the temperature selector to "high". If that doesn't help, you have to start with at least a few observations so we know where to send you. Is the engine getting to its normal temperature? Are the heater hoses hot? What does the temperature gauge read after the engine has been running 15 minutes or longer? Is the coolant level in the reservoir and radiator okay?

Heater problem
2002 Ford Explorer 6 cyl Automatic 125,00 miles

my explorer will not heat changed the thermostat but still nothing please help the only car to drive kids to school in and weather is -9 outside

updated 12/12/09
the hoses are not hot please tell me whats wrong

You need heat now! I need you to check something for me. Start the engine, let it warm up, turn the heater on high, and feel both heater core hoses on the firewall under the hood. They should both be hot. Let me know if they are or what you find.

Joe

Is at least one hot? If not, I would say the heater core is totally plugged and not allowing any coolant flow. With the engine cold, remove the heater core hoses at the firewall. Using a garden hose, see if you can spray water in one side of the core and if it comes out the other side. If it doesn't you need a new heater core.

Let me know what you find.

Joe

When I turn the heat control to hot I hear the heater door actuator clicking. Either the door is stuck or the actuator is inop. Where is the actuator located and is the heater door located at the heater core centered under the dash behind the big black casing. Do I have to separate the black box or pull it out to get to the heater door. Do you have any diagrams.

Probably the actuator arm cracked heres a link to a site that sells actuator for less than most places and give you detailed photographic instruction.

https://www.2carpros.com/topics/climate-control/heater
https://www.2carpros.com/topics/climate-control/blend-door

http://www.youtube.com/watch?v=osu0fGrIw3k

The Explorer is built with a Blend Door to control the heater and AC function. The blend door controls air flowing through AC evaporator and diverts it into the vent system or through the heater coil, or any combination in between. The doors are controlled by a DC motor. The issue with the design is that the system has to calibrate itself and find the end points of movement before the computer can understand the two closed positions and regulate the temperature. The motor is geared to move the doors slowly and with a good amount of force. The door has to withstand the force of stopping the motor, and like bending a coat hanger back and forth, will eventually break. Another reported fail symptom is a “clicking” sound coming from behind the HVAC system. On this model, this is usually an indication of a stripped gear in the motor. Again, replacing the motor is a temporary fix without a properly aligned blend door. The late model Explorer/Mountaineer is a complex system with significant flaws in the design and no provisions for simple access and repair. The fix is not easy, but we can resolve the issues.

heat blows cold air and makes knocking noise

It sounds like the blend door is sticking. This is a vent door located near the heater core that directs air flow over the hear core or switches to AC. Start with that and let me know what you find.

Joe

just recently when i put the heat on there is a clicking sound and no heat. i move the control switch to the cold side and the noise goes away. only cold air is blowing out no heat what could be the cause of this please.? thank you

I had the same problem it was the blend door sticking.

what do i have to do to fix it and keep it from sticking please

most of the time you have to get it replaced because when it does that a piece broke off of it. My explorer was doing the same thing and eventually i couldn't even turn air on it would start making knocking sound in dash. At least that is what happened to me.

It's winter, and my heat doesn't work in my 2002 Explorer, only cold air comes out. Also, when I turn it to hot air it makes a clicking noise and only cold air blows out. Why?

Does engine reach normal operating temp? Heater hoses hot? Maybe a problem with actuator door under the dash?

temp blend door, when that door is positioned properly, full heat, all air goes through the heater core.

My ford explore 2002 stop blowing heat when I turn it to heat all I get is cold and a tapping sound

Sounds like the air blend door is stuck in the cold position -also check the actuator

just like raz said, the blend door motor has failed

Roy

When I turn on the heater it only blows cold air and it makes a clicking sound. What could this be and how much would it cost to get a new heater?

Actually, the heater is most likely fine. However, there is what is called a blend door that is actuated by engine vacuum. Its position (open or closed) determines if you get AC or Heat. Based on what you said, it sounds like it is stuck which is causing you to only get cold air. Check it. It is part of the HVAC system and located near the heater core box.

Let me know what you find.

Joe

I have no heat in my 2002 Explorer. When turned on, it smells like something died. A/C works. What could this be and how do I fix it?

It's possible something did die. You may have to remove the blower motor for inspection. It may also be fungus and mold growing on the evaporator core from the moisture.

That would explain the smell, but would that cause it not to heat up?

It could be blocking the heat blend door.

I have replaced the thermostate and now the engine is smoking when it over heats, why?

Prior to replacing the thermostate I was having my gauge read hot but no smoking occured but the line was hot! Also, my coollant level in the resivior was empty. Now that I replaced the thermostate the engine is smoking and still over heating and my heater stopped blowing hot air.

What should I be checking?

did you bleed the system of air when you replaced the thermostat? did you use a new gasket and torque it properly making sure that it wasnt leaking around it?

was thermostat properly replaced and put in the proper way? was proper thermostat put in?

are there leaks under the car? pressure test the radiator and replace or you'll bust a hose and have to replace that too I speak from experience
ps if you do bust a hose check the small ones first.

id still like it to be the thermostat since its a cheap part and very easy to replace.

always had heat. one day i used the a/c now I have no heat. it blows on the feet, defrost and panel just cold. no heat. please help

there is a blend door control motor that is a common failure. have a shop check it for you to verify and give you a bid.

Roy

I have a 2000 fird explorer and i have no heat. I have heard from many people that it might be my heater core but im not sure. is there any way to find out if it is the heater core that is causing the car to not have any heat or is it something else.

try bleeding the system you may just have air trapped ??

COOLING SYSTEM BLEEDING
WARNING:When engine is operating, Do not remove radiator cap under any conditions. Failure to follow instruction may damage cooling system or engine, or cause personal injury. Always wrap protective material around radiator cap to avoid injury from hot coolant.

Except Villager
Turn heater controls to maximum and set air discharge to instrument panel vents. Turn blower to high. Fill cooling system with 50/50 mixture of coolant and water. Pause several minutes for circulation. Start engine and allow to idle. While engine is idling, feel for hot air at instrument panel vents. If air discharge remains cool and coolant temperature gauge does not move, coolant level is low.
Stop engine and allow it to cool. Top off coolant as necessary. Start engine and allow it to idle until normal operating temperature is reached. Hot air should discharge from instrument panel vents. Coolant temperature gauge should maintain a stable reading in middle of range. Upper radiator hose should feel hot to touch. Stop engine and allow it to cool. Top off coolant as necessary. Check for coolant leaks.

Heater problem
2000 Ford Explorer 6 cyl Four Wheel Drive Automatic

It just started but the heater has not worked on the last two relly cold morning taking the kids to school...By the time i crank it and turn it off about 5 times the heaters starts to work..What could it be...The only other problem i have with it which has been going on awhile is the truck is running rough,drinking way to much gas and sometime the check engine light comes on after a long trip and when we get that teasted it says it is trouble on the number 5 cylinder. but the wires and plugs have been changed. Anyways i am really worried bout the heater now..I am getting someone to look at the other problem but any info oin anything would help..Thanks

Is the engine running at a normal operating temp? If so, start the engine, let it warm up, with the heater on high, feel both heater core hoses. Both should be hot. Let me know what you find with that. Also, I will assume the blower motor is working. If that is where the problem is, when it doesn't work, you need to check if the motor is getting power.

Let me know what you find.
Joe

Where would these hoses be located?

just had some work done.. Exhaust manifold, erg tube the heat was working fine before it was worked on. Now no heat the blower works and I hear the door opening but no heat. However the ac compressor keeps coming on. If I use just the vent with no blower the air will come out warm.. When I drive it gets colder.. Could it be a vacuum problem

yes the system is vacuum operated for direction etc. check for a line off on engine near where work was done. check at engine or vacuum reservoir under hood. connection is at right rear of engine compartment on cowl, could be broken or disconnected etc.