Question about Cars & Trucks

1 Answer

Will a bad o2 sensor cause nothing blowing through vents no cold or hot dont hear anything

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Cars & Trucks Master
  • 53,768 Answers

O2 sensors only report to the ECM to adjust air /fuel ratio and have nothing to do with the air temperature inside the car
what you probably have is a faulty climate control module under the dash

Posted on Mar 12, 2016


6 Suggested Answers


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017



  • 318 Answers

SOURCE: Fully warmed up; blowing hot and cold; Suzuki XL-7

Its just a vent damper plate not operating, it's like a gate which controls the flow of air,,usually they are operated by vacuum, or cables.
Service center time, unless you are handy with your own repairs.

Posted on Jan 19, 2009


  • 186 Answers

SOURCE: the defrost blows air of vents rest of the controls do not blow out any air cold or hot

Does it have auto climate control or dial type HVAC Controls??

Posted on May 10, 2009


  • 1 Answer


Blend door actuator. When it fails for some reason it turns to the hot side and gets stuck. Dash must come out. I usually do it in 3 hours, because I've done it numerous times.

Posted on Jun 17, 2009

paul campbell

  • 1071 Answers

SOURCE: ac only blows cold on the passenger side vents

climate unit is bad

Posted on Jul 23, 2009

Ralph Johnson

  • 645 Answers

SOURCE: I have an 01 Jeep Grand Cherokee. When you turn

behind the center counsel between the floor and the heater housing is a part that is called the blend door actuator. these usually go bad and have to be replaced.

Posted on Mar 16, 2010

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Have 03 spectra with codes po650, poo30 and po134. charged ac clutch is engaged but blowing hot air. is all this related

To clarify, none of this has anything to do with your a/c.
Code 650 is for a problem with the check engine light circuit.
Code 30 and 134 involve the heater circuit for the O2 sensor in front of the catalytic converter. The O2 sensors have a heater that allows the sensors to start working quickly after you start the engine. The sensor and the heater circuit would need to be tested.
The O2 sensors have nothing to do with your car heater or A/C.

Feb 21, 2015 | 2003 Kia Spectra

1 Answer

Cadillac Seville 2007 hot or cold air won't blow thru vents blows fine in the back can hear under dash some clicking wen changing from the floor back to dash vents but nothing happening

HAVC Vent Blend Door failure, under the dash

There are several

Have to check for codes or do whatever is needed to
locate the failed ones & replace

Aug 04, 2014 | Cadillac Seville Cars & Trucks

1 Answer

Cold in Michigan

check your climate control that could be the problem not opening all the way, also if not enough hot air comming out coul be the blend door some cars they used to use vacuum instead electricity to change air outlet some times these hoses get cluged theyr conected to the climate control. now try a cardboard in front of the radiator this will give you extra heat.

Jan 30, 2014 | 1997 Chevrolet Venture

1 Answer

My Montero will only blow heat out of the far left drivers side vent, all the others blow cold. Already replaced thermostat

Hi Monterogirl85 I'm glad to help!

If one of your vents is blowing hot air and all the others are cold, then you either have a A/C door problem or the Actuator Motor that works that door for that vent is bad. I see this problem a lot working on A/C problems all the time. This problem has nothing to do with a thermostat or anything else on the vehicle. It's only a door problem. You'll need to find out which door goes to that vent and remove the actuator and move the door by hand and see if it gets cold out of that vent. Hope this helps and have an awesome day.

Nov 30, 2013 | 2001 Mitsubishi Montero

1 Answer

I have a 2001 Oldsmobile Silhouette and the front Air Vents do not blow out anything at all. There is no A/C heat or defrost. Would a low compressor cause this? The rear vents are blowing out air as...

The blower motor is either bad, or if you hear it blowing in the front but nothing comes out of the vents, then it's a vacuum motor problem. The flaps aren't angled right to allow air to come out of the vents (either for a/c, heat, or defrost).

Jul 07, 2010 | 2001 Oldsmobile Silhouette

1 Answer

I have an 01 Jeep Grand Cherokee. When you turn on the air conditioning air does not blow out any of the vents except a small amount of air (cold) will blow out the defroster vents by the windshield. If...

behind the center counsel between the floor and the heater housing is a part that is called the blend door actuator. these usually go bad and have to be replaced.

Mar 15, 2010 | 2001 Jeep Grand Cherokee

1 Answer

O2 sensors failing

Your O2 sensor has been running for a long long time. OBD 2 checks both O2 sensors *(pre and post catalyst) to confirm it is just a bad sensor and not an out of range sensor condition or catalyst problem.

If your exhaust system was plugged you would hear it as a loud hissing noise of exhaust escaping any way it could before the plug. You would also notice nothing coming out of the back of the exhaust system. Both easy to rule out.

Replace the appropiate O2 sensor, reset your computer, and drive!

Good luck and be careful!

Dec 11, 2009 | 1999 Chevrolet Tahoe

2 Answers

1998 Town Car A/C Blows Hot Air But Is Charged Up

Hi - There may be 2 separate problems. On my 1991 Lincoln Town Car, there is a Thermal Blower Lockout sensor that disables the heater from blowing until the engine temperature reaches a specific temperature. This way if you have vent or floor settings and 90 degrees set and it is winter, you won't get blasted with cold air. When the vehicle warms up, the TBL circuit enables the climate control to blow the hot air. If you use the flr/def instead of the floor or vent control, the TBL should not prevent the heater from working even with a cold engine. On my car, the TBL went bad and always prevented hot air from blowing on the floor and vent settings, even when the engine was hot. Another thing to check is a thermal limitor resistor. It is designed to cut off the blower at very hot temperatures, except if the blower fan is in the hi setting.

As far as the A/C is concerned, can you verify if the clutch is engaging or not? A rapid cycling of the clutch is an indication of low freon. If you are absolutely sure that you are fully charged on freon, I think there are 2 possible causes: (1) Bad pressure switch on the accumulator is indicating low freon that is telling the compressor not to work; (2) a blocked orifice tube.

Aug 02, 2009 | 1991 Lincoln Town Car

3 Answers

Center vents cold side vents hot please help bthibs

hello,good day,seems your recirculating pump need tobe check,ty

May 15, 2009 | 1996 Mercedes-Benz C-Class

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

33 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

85223 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

john h

Level 3 Expert

22486 Answers

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

Answer questions

Manuals & User Guides