Questions tagged [hvac]
HVAC - Heating, Ventilation, Air Conditioning.
187
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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 ...
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1
answer
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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 ...
- 3,149
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2
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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 ...
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3
votes
1
answer
7k
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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
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1
answer
411
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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 ...
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2
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10k
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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 ...
- 151
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2
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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 ...
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4
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3
answers
57k
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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.
- 285
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5
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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, ...
- 247
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2
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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, ...
- 21
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2
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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 ...
- 786
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0
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86
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Where is the air hose from the manifold located on a 2006 jeep liberty?
I have no heat at idle in my jeep liberty and I'm hoping to just repair as a temp fix.
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0
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63
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Can I add a rear evaporator in place of my rear heater for my passengers
I live in a hot climate. I do not need heat to my rear passenger feet. Can I run A/C pipes instead of hot water and replace radiator with an evaporate. The Vehicle is a 1988 Toyota BJ74. The blower ...
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3
votes
1
answer
228
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1994 Chevy S10 2.2 L LS pickup-no heat or ac and sounds like a fast sewing machine
1994 Chevy S10 2.2 L LS pickup with rebuilt engine with new thermostat and new radiator. Replaced EGR, fuel filter, and gas cap. Idles loudly like a fast sewing machine. No heat or cool - fan blows. ...
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5
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4
answers
15k
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How to clean Car's HVAC and AC system
There is a relatively unpleasant smell in my car's HVAC, AC or heating system.
Failed idea#1: I removed the cabin air filter and sprayed lots of Lysol in there. It did not help much.
Failed idea#2: ...
- 940
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3
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1k
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Are A/C Control Panels Universal?
Are A/C Control Panels (the panel that controls the: Fan Speed, Temperature, and Head/Foot air flow direction) in cars are universal, similar to USB connections are for computers? For example, I would ...
- 91
2
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1
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746
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1991 Chevrolet Astro - Vents, AC, Heat Not Working
I have a 1991 Chevy Astro. Regardless of what setting (AC, Vent, Defrost, High/Low, etc) I use, I do not appear to be getting any air through any of the vents. I would guess the problem would be ...
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2
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Honda Civic 2007 AC compressor replaced, clutch not engaging, no ECM signal
I have a complex AC problem in my Civic. I need to tell you the story so that you might get a potential diagnosis of the issue:
Car started having problems with AC in 2015. After driving for a while, ...
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6
votes
2
answers
33k
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Water dripping on driver's foot. How to fix it?
Just this morning I noticed there is a water dripping into my shoes while driving. My aircon is open. The weather is sunny and warm. My car is Toyota Vios.
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1
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Indica petrol 2006,coolant leakege
I have bought a 2006 petrol Indica Xeta,and changed the normal radiator water with valvoline super koolextra. After 50km of driving, I kept the vehicle in my car porch. After 5 days When I opened the ...
2
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1
answer
1k
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2009 Ford Ranger heater Blend Door
My heat blend door actuator burned out. I bought a new one. I installed it but the blend door only moved a fraction of what it is supposed to so I disconnect the actuator to not burn it. My question ...
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3
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2
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578
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faint whining sound coming from air conditioner
My wife has an '05 Honda Element and when we turn the A/C on there is a very faint whining sound. The sound is not constant, it goes on and off and you have to listen closely to hear it. The A/C is ...
- 1,169
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2012 Jeep Patriot Heater Core Leak
Purchased late 2012 new from dealer. My son reported "hot oily amber drips" on his bare rt. foot while driving home from the beach. I investigated and it very much appeared to be coolant leaking from ...
- 605
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1
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10k
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2006 Jeep Liberty - AC clutch won't engage
The AC clutch on my Jeep Liberty 2006 won't engage. Here is what I have checked so far.
Fuse 14 in the passenger cabin
21 in the engine compartment are ok
AC relay ok
When I jump the AC relay I ...
- 51
8
votes
3
answers
741
views
What can I do to prevent my air conditioner from smelling moldy as the temperatures begin to rise?
What can I do to prevent my air conditioner from smelling moldy as the temperatures begin to rise?
Every year someone I know or myself begins to get an odor from their air conditioner that's musty or ...
- 33k
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1
answer
61
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08 Saturn Aura needs help
If I sit in my car with it idling the heat goes cold, but if I press the gas or drive off it heats back up. Can anyone help pinpoint this problem? Also, with engine running I can clearly hear fluid of ...
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7
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44k
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Can a car AC unit be run on just the car battery?
This might be a silly question but I was wondering if a car AC unit be run off entirely on battery or alternator?
As this could help in
Preventing power loss during important times such as ...
- 1,062
6
votes
1
answer
317
views
Why does the air conditioning suddenly blow cold air?
I have a BMW 320i 2008. When I turn on the hot air and Automatic recycle, after a point, it blows cold air for 5-10 mins, then back to hot and so on.
This doesn't occur when I put the recycle on.
Any ...
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2
answers
4k
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2006 Jeep Commander - heater is only blowing hot air
My 2006 Jeep Commander continues to blow hot air even when the switch is turned completely off. Has anyone had this problem before?
Problem description from OPs 'answer' below:
"If I turn the fan ...
- 21
3
votes
1
answer
2k
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Unable to redirect airflow from floor to defroster, etc.in 2006 Cobalt
I replaced the heater / AC control module, but the airflow deflector still doesn't change. It is stuck on floor. It sounds like the module is trying to change, but nothing happens.
7
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1
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Measuring A/C refrigerant I got 96 PSI, is 96 PSI bad?
I bought a car refrigerant gauge online because my A/C is not cooling the air at all and the first suggestion was to check your refrigerant to see if it is empty or low.
I found out where my car's "...
- 416
2
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1
answer
3k
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For cleaning HVAC with Lysol, should the AC be on or off?
Many people recommend spraying Lysol Disinfectant Spray or similar products into the HVAC intake to kill mold and bad odors inside HVAC.
Should the AC be on or off for this procedure?
As far as I ...
- 215
6
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2
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2k
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Which knob setting best cooks the mold inside HVAC?
I am trying to eliminate odors inside HVAC by cooking the mold that is presumably causing them, as suggested in https://mechanics.stackexchange.com/a/146/15334 (which got 39 upvotes)
However, I don't ...
- 215
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1
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How does clogging tailpipes result in carbon monoxide in the cabin?
Reports like this of people dying from CO poisoning in idling cars due to "clogged tailpipes" are disturbingly frequent. But how can this happen if the car is outdoors?
First of all, how does a ...
- 1,189
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1
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Hot air only flows to vents, not to defrost?
I have a 1995 VW Jetta GL, 2.0 engine, 5 speed, a/c.
My heater won't switch between defrost, floor heat or vents. It's stuck on the vents and I can't seem to find out why.
I have torn apart the ...
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3
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0
answers
2k
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Heater only blowing cold air
I have a 1997 F150 with a 4.2L engine. The engine warms to a normal operating temp. Blower motor is fine. No matter where the AC/Heater control switch is turned to I only get cold air. Im thinking the ...
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2
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How can I determine my HVAC layout?
Answers to Why does my A/C blow foul smelling air when it first turns on? suggest several fixes that depend on knowing where in the car they are located. I can't determine in any of my cars where the ...
- 1,189
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Saying its running hot but full of coolant and not over heating [closed]
2005 Hyundai Elantra. Says its running hot but has coolant and so far hasn't over heated and also can't turn on heat in car because smoke pours from vents into the inside of car.
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2
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A foul odor inside vehicle, like something is dead inside vehicle (Toyota Camry 2002), especially when car is not running [duplicate]
Over the past 5 days, I detected a really bad foul odor inside my 2002 Toyota Camry. It is worst when the car sits overnight, or for any length of time. As soon as I open the car door, "the smell ...
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3
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1
answer
125
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How to stop car steaming up?
My 2003 Opel Agila always seems to steam up constantly while driving, in all weathers. I do not have a damp problem in the car either, everywhere seems dry.
I have checked the following things:
Air ...
- 6,555
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1
answer
2k
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2008 Ford escape hybrid blend door actuator
I have a similar issue, my 2008 ford escape hybrid driver side remains on cold and my passenger side climate control works fine, no problems. I also notice that when I turn the knob on the driver side ...
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3
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0
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133
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2010 Volvo S80 - Cabin HVAC system schematics
Something in my sedan's cabin air system smells bad (organic bad, not mechanical bad), even after changing the cabin air filter.
I have a bore scope, vacuum, compressor, and hoses sufficient that I ...
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2
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12k
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How do I flush out bad smells in my air conditioning? [duplicate]
My car seems to have a pretty bad smell in the air conditioning. WHat is the best way to flush out these smells?
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2
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6k
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HVAC blowing out of defroster and floor
1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner.
I changed my IAC Valve today, and coincidentally, my HVAC started blowing out of the defroster and floor no ...
- 476
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2
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2k
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Ford Explorer Weak Air Flow Defrost/Air Conditioning
My 2002 Ford Explorer developed a weak defrost late in the winter (I don't drive it all that much) and now in summer the air conditioning has a very weak air flow -- doesn't cool anything. I'm sure it'...
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3
votes
1
answer
11k
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After replacing A/C Schrader valve and O-Ring, Do I need just refrigerant?
It looks like I lost all of the refrigerant due to a leaky schrader valve and O-ring. The A/C stopped cooling a few months ago, but I just got around to tracking down the problem.
Do I need to flush ...
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3
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1
answer
110
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Will I damage my heated rear windscreen if I leave it on?
My 2003 Opel Agila 1.2 does has an old mechanism where you pull out one of the heater controls and the heated rear window comes on, and it does not automatically turn off (by design)
Will I damage ...
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vote
2
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3k
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AC leak best solution
I have a 2001 Honda civic. I recharged my ac with refrigerant but it only last about 3 days before the cold air stop blowing. I assume this would mean that the leak is pretty bad. Air is still blowing ...
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2
votes
1
answer
953
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Which convenience features in a car affects fuel economy?
I understand that the A/C compressor runs with the engine belt, so it will always uses some HP when engaged, therefore it will have some effect on fuel consumption.
What I want to know if there are ...
2
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0
answers
5k
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Can a blend door be easily fixed/replaced in a Ford Escape Hybrid 2006? Also, passenger side airbag removal?
I recently got my AC compressor fixed, but after doing this it turns out my AC still isn't great because of a messed up blend door (according to my mechanic). Apparently this is a fairly common ...
- 133