Question about 1998 Volvo S70

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Volvo s70, 1998, HVAC is not air out at all

I can't figure out if it's the fuse or a belt. The HVAC is not blowing out any air what so ever. The seat warmers work and the back window defrost works fine. Any suggestions before I get bent over by some mechanic??? Thank you - Single mom with little cash....

Posted by Maureen McGinley on


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First check your fuses and clean them and coat them with Dielectric grease, then try replacing the Relay if that does not fix it.

Posted on Jan 28, 2015


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  • 324 Answers

SOURCE: heate rwill not produce

replace the control unit.

Posted on Nov 26, 2008



  • 3 Answers

SOURCE: no air or heat blowing from vents

if the fan is blowing this could be a problem with the climate controll switch that changes the direction of air from floor to defrost to vents, some are vacuum controlled through a vacuum operated mechanism that opens and closes a door in the vents which redirects the air to different places.

Posted on Jun 10, 2009



  • 546 Answers

SOURCE: 1999 Volvo S70 heater and defroster blowing "fog"

suspect leaking heater core.check coolant level.

Posted on Sep 29, 2009


  • 3 Answers

SOURCE: Vent/heat/defrost broken Volvo 760

I have the same car and had the same problem. The inside air intake for the heater system is located above the passenger's feet. An empty plastic bag got sucked in there and kept the door from moving properly. I had to take off a few panels, then one on the vent. Once I removed the bag, no problem.

Posted on Oct 21, 2009

Testimonial: "This did not solve my problem, but got me on the right track! Thanks!"


  • 1 Answer

SOURCE: 2005 Volvo S40 Side Mirror Defroster?

applgirl2, did you find a fix? I'm having the exact same problem. Driver side works, passenger suddenly doesn't.


Posted on Nov 23, 2009

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My GMC Envoy keeps blowing the 10 amp fuse for the heaters.I unplugged the front blower fan but it still does it. Is the other fan in the consul?

The fuse isn't for blower motor. I saw a fuse 39 and fuse 36 both 10 amp, both for hvac. I don't know which one is blowing? One fuse is for actuator doors under the dash, the other is battery voltage to hvac control module. One is hot all the time, the other goes hot with key on.
What is model year? Does it blow as soon as you turn on the key? Any applicable hvac trouble codes? About all I can do is track wiring circuits.

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I have a 2003 Saturn L200 2.2L Manual Drive and the heater or AC will not work no air blowing.

There is a relay that powers the blower motor circuit . Left I/P fuse box , do you know where that is ? The relay is IGN 3 relay .
Fuse Block- I/P - Left
LF of the passenger compartment, behind the kick panel
Does your car have Manual or automatic climate control ?

Oct 23, 2016 | 2003 Saturn L-Series

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A friend replaced my Heater Core for me and it still does Not blow Hot Air ...can you give me some trouble shooting ideas to check ?

Does the heater blower motor work? That is what blows cool air across and around the heater core and then through the case and out the vents as warm air blowing. The heater motor wiring circuit is separate, and gets pretty complicated with electronic HVAC controls, but it does have fuses.
If the blower motor works but you only get cold air, not warm, out the vents, then you have a problem with the heater case doors not operating properly. yes, the old temperature blend door problem, the actuator motors or the vacuum servos not operating the doors. By the time you get all that figured out and working again, you will be an HVAC expert in your own right. Your turn for a comment...what model and year of car anyway, are we talking about?

Feb 21, 2016 | Cars & Trucks

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No heat 2003 Volvo s80

Is the blower blowing air at all speeds?

Feb 13, 2013 | 2003 Volvo S80

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Replaced air compressor, blow's cool air and then warn air

check the blend door actuators and for a vaccum leak to the hvac

Jun 12, 2012 | 2006 Pontiac G6

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Rear A/C does not blow air

{: ) You didn't mention which vehicle model you have, but anyway, you can start by checking all the HVAC fuses if the blower is not blowing at all at any speed.
A usual fault is the rear blower resistor getting open circuited.
The rear a/c blower may be stucked or open circuited.
A malfunctioning Rear HVAC controller is possible. although rarely the cause.

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New battery install, now cold air willnot blow on passsanger side

The HVAC system may need to go thru a recalibration. Set all HVAC controls and switches to OFF or fully CCW postions, then either disconnect battery or pull fuse #36 in the rear fuse panel. Reconnect battery or reinstall fuse #36, turn ignition key to ON position (don't need to start) and wait about 2 -3 minutes. If this does not solve problem, there is a problem with the passenger side blend door or its actuator.

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My air blows good in my vechile but the problem is that the air won't out out of my front vents. when I put the dail on the front vent it blows out on the floor. what can I do to fix my problem. I...

Could be one of two things, HVAC needs to recalibrate itself or one of the blend doors (or its actuator) is stuck. To accomplish the recalibration, set all HVAC controls and switches to their OFF or CCW positions, pull fuses # 36 and 39 in the rear fuse panel, wait about a minute then reinstall fuses. Do not touch any of the HVAC controls for 2 -3 minutes. If this does not resolve the vent issue, you will need to have the HVAC diagnosed by a technician.

Jul 11, 2011 | 2004 GMC Envoy

1 Answer

My 2005 suburban AC is blowing hot air; one minute it was blowing out cool air and then it started blowing as if the heat was on....

If you touched any of the A/C controls within 45 seconds of starting your Suburban (after the battery change), you messed up the 'calibration mode' of the HVAC.

Pull the HVAC fuse (10amp) under the hood, and pull the two adjacent fuses (30 and 10amp) under the dash listed as 'climate control' in the manual.

Push the fuses back in, restart your car, but DONT TOUCH ANY of the A/C controls for 90 seconds.

I bet the A/C starts working again normally.

May 06, 2010 | 2003 Chevrolet Suburban 1500

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