Question about 2000 Chevrolet Blazer

2 Answers

No heat Changed thermostat, controls all seem to be working , fan blows good, but only hot air. Seems as if some door is nit opening to let hot air in, only the cold.

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 112 Answers

Check the hoses that go through the firewall into the heater core to see if they are hot. If they aren't you may have air pockets that need to be bled out of your coolant system. If they are hot, you may have a bad vacuum supply to your blend doors. You should have a vacuum supply hose under the dash toward the center. If you have a good supply, you probably need to tear down and inspect the ductwork and boxes.

Posted on Oct 28, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 121 Answers

The "blend door" is probably the issue, however the door itself is actuated by an electric motor located on top of the "heater box". You might be able to see the wiring to the motor from beneath the dash, but you will have to remove the whole dash assembly (trust me it's a pain) to access the screws that attach it to the box.Hope this helps.

Posted on Nov 02, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2003 Pontiac Montana heat gets hot in front, blows but seems weak, and no heat on rear controls but blows ******* rear. what is going on?


Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?

Feb 25, 2015 | 2003 Pontiac Montana

1 Answer

The heat blows cold and hot. Is it the resistor module or the themostat


The resistor controls fan speed, not temp.
If the heat comes and goes, it could be the thermostat, or the radiator could be low on coolant, or have air pockets, or one of the blend doors may not be working correctly.
The blend doors direct air thru the heater core and the vents.

Dec 20, 2012 | 2003 Chrysler Town & Country

1 Answer

I have a problem with the heater on Ford Escort 1.9 TD. The fan works but blows cold air. Changed the water pump, the system is filled with liquid, but no heating. What could be the problem?


maybe the thermostat is bad if the upper and lower hoses are both hot that means your thermostat is open and you should have heat. there could just be air bubbles in the system some times their will be a bleeder near thermostat housing just open it while its running till all air comes out.or you are a little low on fluid.
the only other 2 thing i can think of is if your heater core is clogged try to flush it out,or if you have a blend door actuator or a vent control valve hooks to your heater hoses near heater core that is bad that normally opens and closes. a door or valve shutting the hot air from entering.sorry there is a lot of things that can cause your problems!

Dec 10, 2010 | 1998 Ford Escort

1 Answer

Same problem: 2001 Toyota Tundra that won't blow


that is entirely possible yes, could also be a broken cable to change the temp from hot to cold, could be a problem with certain ac components under the dash

Mar 12, 2010 | 2001 Toyota Tundra

4 Answers

Only Blows Cold Air


heat sensor for radiator fan switch, thermistat,water pump? Does hot air blow when moving? does car over heat when sitting idling for over 10 minutes. If so check fan first, then water pump. last cause thermisat

Mar 07, 2010 | 1998 GMC Safari

2 Answers

No heat from my heater. Fluid levels are good, motor seems slow to heat ( at least on the guage)


Everyone jumps to the thermostat because its a good place to start. If, when the engine is truly at op temp, the upper and lower radiator hoses are both hot, its not the thermostat. If you have the temp control to hot and both heater core hoses are hot, its not the valve or control. Check the blend door actuator (behind the glove box), and then the blend door itself as it may be broken (its plastic) and not closing off the cold air.

Nov 07, 2009 | 1996 Ford F250 Crew Cab

1 Answer

Heater blowes cold air replaced heater controls and all vales are working the heater core gets hot on both sides so how do i fix this


It seems to me if your heater core is hot, and the fan blows cold air, then your ducting is closed off. Try and see if your duct door is opening up. You say you changed out your controls, but it sounds as though it wasn't your controls that were bad, but what they control is not opening up.
It's all well and good that the heater core is getting hot, but if the fan cannot deliver that hot air passing through it, then walah.
It has to be an air duct obstruction. Either the ducting is collapsed, the duct door is not opening, or you have some obstruction blocking the ducting. My guess, because that is all I can give you without seeing for myself, is that the linkeage or solonoid that opens the duct door is not working. Older cars had a cable, but I believe newer use a solonoid to operate the opening and closing of the door. The door is there so you don't get the heat from the core when you are using AC.
Hope this helps.

Sep 11, 2009 | Dodge Pickup Cars & Trucks

3 Answers

2004 Ford Expedition XLT, front blend door actuator


Hope I was avle to help, glad you up and going.

May 26, 2009 | 2004 Ford Expedition

1 Answer

98 Ford Experdition V8-281 4.6L SOHC-the heat will not get hot.


Have you tried replacing the heater core ? If the flushing of the heater core did not work, the heater core may be bad. Very clogged with gunk and residue. did you try to check the valve that opens the hoses to the heater core. This valve can be vacuum, opened by cable or electric. Check to see if the hoses get hot at the firewall. they should be hot.

Feb 07, 2009 | 1999 Ford Expedition

1 Answer

No heat


if the heater hoses are hot on both sides(indicating the engine is at full temp) and you feel the heat controller in dash is working properly, i would suggest disconnecting both heater hoses and backflush heater core with decent amount of pressure. if this improves condition but does not solve completely, heater core replacement is necessary.

Nov 15, 2008 | 2001 Mercury Grand Marquis

Not finding what you are looking for?
2000 Chevrolet Blazer Logo

200 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

64286 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...