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Questions tagged [hvac]

HVAC - Heating, Ventilation, Air Conditioning.

1
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1answer
13 views

Blower stopped working

My blower stopped working suddenly on my 04 Trailblazer. I figured it was the resistor but as Murphy's law would have it, the battery died a few days later. I replaced the battery and the blower ...
0
votes
1answer
17 views

Blower motor not blowing

I have a 2006 Chevy Equinox and the blower motor will not blow at all. I replaced the blower motor and it would blow intermittently for a few days then stopped all together so I then replaced the ...
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0answers
12 views

1999 Honda Accord HVAC gets stuck on dash mode

The HVAC on my 1999 Honda Accord gets stuck on the dash mode. All of the control buttons work and I can cycle from one to the other until I put it on dash only mode. Once there, the motor stops ...
2
votes
3answers
89 views
+100

Does outside temperature sensor affect the HVAC system?

Car: 2010 Mazda 3 2.5L Manual My car's outside temperature display is way off. It is showing warmer than the actual temperature. For example: Today the real temperature was -9C and it showed +18C. ...
0
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1answer
25 views

No heat when idle

I have a 2013 Dodge Grand Caravan. I had the heater core replaced recently and now I don't have heat on the right front passenger side. I have flush the line both front and back and ensured the ...
3
votes
2answers
51 views

Can I replace my AC Compressor myself? 2008 Vauxhall Astra 1.9

On my 2008 Vauxhall Astra 1.9 CDTI my AC Compressor has gone I was wondering how easy it is to replace myself? I'd get the system drained at a garage first. I've included the service instructions ...
0
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0answers
9 views

2007 Hyundai Tucson gals v6

I have a 2007 Hyundai Tucson gls v6 4x4,my ac was running fine but when I turn the heat it blows cold air,when the car off I turn the key to turn the heat and I turn the knob for I hear vent but not ...
1
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0answers
27 views

Clicking sound from AC on startup

I have a 2008 Jeep Grand Cherokee that makes a very loud clicking noise when I turn the AC on just after starting the car. It only happens every so often and it lasts about 20 seconds. It sounds like ...
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0answers
20 views

Geely Panda - sticky air vent selector

So, the knob broke on my air vent selector. Over time it had been getting more and more difficult to turn -- particularly, from the 3rd position to the 4th position . Eventually the knob gave out. I ...
1
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0answers
59 views

Diagnosing AC performance after repair

Background: Vehicle is 92 Civic with R-12 AC system. Compressor was replaced 2 years ago due to leak diagnosed there by AC technician (not sure if that was actually the problem). All but about 100g of ...
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0answers
22 views

Ford Expedition Rear HVAC not turning on

I've turned the selection dial on but the rear HVAC unit isn’t coming on. I've checked to see if everything is connected but it's still not working
1
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2answers
65 views

AC cycle off too long when driving

My AC system has been problematic recently on 2014 Ford with barely 31000 miles. Its uses Visteon 16 compressor. When driving, after some minutes, it will shut off for long enough until the vent ...
2
votes
1answer
21 views

Excessive A/C condensate on outsideof box

When running the A/C on my 2011 Chevy 2500 Duramax the outside of the heater box gets saturated in condensate. After 1 hour of running i'll have a 1/4" deep puddle on the passenger floor. It's not a ...
1
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1answer
143 views

AC Compressor runs for 45 mins and shuts off

This is on a 1997 Chevy C2500 with a 5.7L. It has a new AC compressor, AC condenser, AC Manifold hoses (suction and discharge). After an evacuate and recharge, the AC blows ice cold for about 45 mins (...
2
votes
0answers
86 views

A/C Air Recirculation

In my 2017 Toyota 4Runner I'm interested in a solution to keep recirculation on by pushing a button even when the defrosters are on. In other words, a wire to override the defrosters so recirculation ...
0
votes
1answer
715 views

AC clutch not engaging

I have a 2007 Honda Fit. Two summers ago, my AC stopped working. I brought it to a shop, where the compressor was replaced. This fixed the problem at first, but last summer the AC started working ...
0
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1answer
24 views

Is there any possibility to go with a/c compressor, repair/overhauling instead of moving with replacement

Is there any possibility to go with a/c compressor, repair/overhauling instead of moving with replacement. Then, what are the parts we can go ahead with change of parts of a compressor.
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0answers
34 views

Cabin Vents Problem

The lower vents inside my 2011 Honda Civic are the only ones blowing air. The upper vents are not working. I have already changed the air cabin filter. Is the problem a faulty blend door actuator? Or ...
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2answers
2k views

Car AC sometime cold sometimes not

Recently I have noticed that the air from ac vents sometimes cold, but sometime less cool/fan mode for a while, before return to cold. I also noticed almost continuous "hissing" sound from around the ...
1
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0answers
33 views

No air-conditioning

If the AC was leaking and someone unhooked the AC unit, would that be causing the belt to squeak now? If so, what would you suggest?
2
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0answers
31 views

Chrysler Sebring 2007 Hvac

My Ride Chrysler Sebring 2007 Driving side AC is blowing hot air while passangr side is cold. Any theories?
1
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0answers
207 views

2007 Jeep commander, car blows hot (extremely) air

Had actuator as well as controll head replaced and car still blows hot air. When controls are in off position hot air will blow in. Turn ac on hot air still blows in. Been to two Jeep dealers and ...
0
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0answers
49 views

Is the fan in front of the radiator fused?

I have a 96 Mercury Sable GS sedan. I have no heat or air and the fan is not rotating at all. Also it overheats in the summer. The thermostat has been replaced.
4
votes
1answer
110 views

Is it bad to immediately crank the air conditioning all the way up when you start your car on a really hot day?

There have been times in the summer when my car is in my driveway all day in 100-degree weather, and combined with the sun, it must be 140+ degrees in my car. Can it damage or shorten the life of my ...
1
vote
1answer
359 views

Squeaking noise when I change the air flow mode

When I switch the air flow mode to or from "windshield", I can hear a creaking/squeaking noise coming from the windshield's defroster outlets. It only lasts a second, so I know it's coming from the ...
1
vote
1answer
1k views

What should a/c low side/high side pressures be after weeks of non-use?

I removed the compressor clutch relay last week when I began noticing severe engine bog when the compressor engages. I'm Hopeful that I can minimize further damage and salvage whatever I can. Now it's ...
3
votes
1answer
127 views

AC system automatically switching to hot defrost

In my 2009 Dodge Grand Caravan I recently had the AC compressor replaced. Since then, while running the AC the system will automatically and randomly switch to pushing hot air out of the defrost vent ...
2
votes
1answer
609 views

The heater fan not coming on in my hyundai accent. Car has no A/C option

No air coming out when I turn the heater on. Turn the fan switch on but no air coming out.
3
votes
1answer
841 views

why condenser is placed before the radiator?

i am confused why radiator is placed after the condenser in an automobile. what will happen if we place radiator before the condenser? whether it is related to design or temperature.
1
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2answers
407 views

New Evaporator has bent fins

I bought a new evaporator to replace my old leaky one. However it has some fins bent. Should I return the evaporator? Or should I try to get a new one? EDIT: I just figured out what happened, this ...
1
vote
1answer
277 views

What to replace with the evaporator core

I have a pretty big leak in my evaporator. I can hear a hissing sound when it's pumped with freons. So I'm going to replace it, along with the expansion valve and the receiver drier. It's quite a ...
1
vote
2answers
33 views

A/C not as effective when stopped

I purchased a 2010 Ford F-150 with the 4.6L motor. The AC seems to work fine, but only when I am moving. When the truck is moving above 30 mph it produces a relatively cool stream of air even if the ...
1
vote
2answers
63 views

Honda Cr-V AC Died

Recently my 2006 Honda Cr-V AC died - again. After researching I discovered I had "black death" where the whole AC system is infected with little black chips To judge by the number of upset owners ...
3
votes
2answers
553 views

2007 Pontiac g6 keeps blowing fuse

There's a fuse under my hood that controls the heat, ac, defroster etc. a couple months ago they all stopped working. I checked the fuse and alas it was blown. I've bought replacement fuses with the ...
1
vote
1answer
24 views

Mildew Scent in Car when Off

I have a 2012 Kia Sorento, which last year had an issue where the condensation drain line was stuck behind the exhaust manifold, causing the line to be pinched and condensate to accumulate to such a ...
1
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0answers
37 views

Are there any cars where the blower motor is controlled by switched mode power supply?

I have seen many questions here related to blower motor resistors. That sounds like a really old-fashioned kind of technology. This made me wonder whether there are any cars that would use a switched ...
1
vote
1answer
31 views

Is a positive multimeter measurement at the blower motor power connector sufficient to diagnose a failed blower?

Last week the A/C fans on my 2004 Honda Accord LX failed. It wasn't quite all at once... the fans kicked in once or twice after the initial failure, but cut out again after a couple of minutes. After ...
4
votes
2answers
619 views

Subaru Blitzen overheating but heater blows cold air

I have a 2000 Blitzen. My heater blows cold air and tonight it overheated. It is not losing water. Would this be the thermostat or an air blockage?
1
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2answers
76 views

Why doesn't my A/C blower motor have speeds anymore?

We have a 1997 Chevy Suburban. During the winter we were in Utah and our front blower motor started shrieking like a banshee, so we replaced it (it was very, very cold outside so not blowing hot was a ...
2
votes
0answers
110 views

Toyota Yaris 2010 A/c problem

I have a weird problem with the A/C on my Toyota Yaris 2010. The A/c takes time to cool after being in the sun for a long time, and when the A/c does cool somewhat, it starts behaving weird. When the ...
1
vote
1answer
2k views

New AC compressor - steps before turning it on?

I installed a new AC compressor on the Solstice of Sorrow the other day, but haven't turned it on yet. I'm planning on recharging the system this evening. Now, before I do this: am I supposed to oil ...
3
votes
2answers
2k views

AC compressor not staying engaged

I own a Mazda MX-5 NB (mk2). I just got it back from the workshop, as the AC compressor had to be replaced. Unfortunately I am noticing an odd behavior with it. Initially the compressor engages ...
3
votes
1answer
2k views

A/C hose blowout while charging new system, do I need to add more oil?

I installed a brand new A/C system in my 91 Mustang (compressor, condenser, accumulator, and all hoses and fittings) and when I began charging it last night the high-pressure side hose from the ...
1
vote
1answer
66 views

What, if any, kind of mesh can I place over my cabin ventilation intake duct?

I experienced a loud rattling noise when I turned on my Mazda 3's A/C for the first time this season. So, I decided to take apart my ventilation system (cabin air filter compartment, and intake duct ...
2
votes
2answers
2k views

Cannot control heating/air due to bad DVD! (Acura MDX)

I tried searching for this question but could not find it. Anyway, first of all, I am not anything even remotely close to a mechanic. But we have a major issue with my wife's Acura MDX. I can't ...
4
votes
0answers
86 views

Clunking noise from dash of 2005 Ford Explorer

All of a sudden there is a loud clunking noise coming from the dash of my 2005 Ford Explorer. Observations It definitely sounds cyclical. Exists only when climate control system is ON. Sound ...
3
votes
2answers
9k views

Why does the radiator fan have to start when turning the A/C on?

The inner blower fan is the one that pushes the air and not the radiator fan.
4
votes
5answers
10k views

1999 Honda Accord can't change ventilation mode

My wife has a 1999 Honda Accord. The buttons that let you switch the ventilation between face/feet/defrost don't work. It is stuck on face so you can't defrost in the morning. The buttons for face, ...
3
votes
2answers
708 views

Nissan Versa 2009 - Air in Car just stopped

The heater in my car just stopped working the other day. No air comes out at all. A few days later it started working again, only to stop last night. Sometimes I feel a tiny bit of heat at the vents, ...
4
votes
2answers
1k views

Does putting down the visors help defogging the windshield?

My old Fiat Marea Weekend had instructions for defogging the windshield on the inside of the driver's visor: Turn the blower on max Turn the heat on max Turn the recirculation off Put down ...