Questions tagged [hvac]
HVAC - Heating, Ventilation, Air Conditioning.
187
questions
3
votes
1
answer
517
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 ...
CommunityBot
- 1
0
votes
2
answers
854
views
2018 Toyota Camry - Loud Idle When AC is On
I have a 2018 Camry (less than 5K miles), and when it's in gear with my foot on the brake, it has a loud idle. The first time I heard it I was in line at a McD's and I thought to myself, "I hope that ...
CommunityBot
- 1
5
votes
2
answers
582
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 ...
CommunityBot
- 1
0
votes
1
answer
113
views
1989 Chevrolet S10 Blazer AC issue
I have a 1989 S10 Blazer with a 4.3 L V6 engine.
It has an AC that is giving me some trouble.
Observed Behavior: When i slide the mode selector to any AC mode , it blows the ac fuse.
Ive replaced the ...
CommunityBot
- 1
1
vote
1
answer
34
views
What is the common name for a ventilated driver seat providing a cool-or-warm air draft?
I recently drove a car with the nicest feature I've seen in a car in recent memory: a gentle air draft from micro holes is directed at the back of the driver.
If, like me, you've had your share of ...
- 153k
0
votes
1
answer
3k
views
2013 Focus SE Dash Vents not blowing AC or heat, all other vents work fine
The climate control in my 2013 Ford Focus doesn't blow anything out of the dash vents. Defrost and floor vents blow fine and I can select between them without issue, but when I select only the dash ...
CommunityBot
- 1
1
vote
1
answer
88
views
Was charging the a/c and the pump engaged but just warm air came out
Put a vacuum to the a/c then charged it. It took 1.5 of the 2.5lbs it calls for and so I fired it up and turned on the a/c.
The pump engaged but the air was still warm and the pump got real hot, too ...
CommunityBot
- 1
1
vote
1
answer
7k
views
Can I vacuum a/c system from low side only
I have a 90 suburban the Schrader valve in the high side is non removable and the line is discontinued. Napa can make a new hose with out valve. Can I vacuum from just low side?
CommunityBot
- 1
0
votes
1
answer
219
views
A/C: Why does the LOW-side pressure *increase* when the compressor runs?
My heater badly needed replacement (leaking a fine mist of coolant inside the cabin), the A/C hadn't held a charge for years, and they're both in the same box that's a pain to get to and you have to ...
CommunityBot
- 1
0
votes
1
answer
76
views
When you HVAC fan on with AC and heat off, does it go past evaporator?
If you switch AC and heating off but put fan on, does it mean clean air gets pulled and put in cabin while staying separate from the evaporator? Or does this air pass by the evaporator then go into ...
CommunityBot
- 1
5
votes
1
answer
10k
views
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 ...
CommunityBot
- 1
0
votes
1
answer
112
views
Can I get a HVAC diagram that shows vent locations and components for 2005 Ford Freestar
I have a 2005 Ford Freestar that has floor and ceiling vents in the back of the cab. I'm interested in installing a 3rd party external heater and would like to see the ventilation routings to ...
CommunityBot
- 1
0
votes
1
answer
89
views
Citreon C4 Grand Picasso HVAC inoperative
I havent driven my C4 since before Christmas but ive been starting it regularly and keeping it snow free. Just started it again but the air con and demister isn't working. Could it be frozen?
CommunityBot
- 1
0
votes
2
answers
76
views
A/C malfunction
What could cause the pipe out the compressor of the car to be too hot, I mean too hot to be touched with a bay hand, while the pipe after the condenser is slightly warm or rather normal.Then I noticed ...
CommunityBot
- 1
0
votes
0
answers
71
views
2017 Ford explorer HVAC blower motor will occasionally start when the motor starts however will turn off shortly after
I have a 2017 Ford explorer which has an intermittent issue with the blower motor. About 95% of the time when starting up the car, the blower motor will not start at all and will not respond to any ...
- 215
0
votes
4
answers
10k
views
What is the purpose of high pressure service port in cars ? Can we charge refrigerant into the system by high side service port?
I have read on internet and in Tesla Model S service manual book that we can charge refrigerant by high pressure service port (with gas charging machines or another way) as long as there is vacuum in ...
4
votes
2
answers
560
views
AC stops blowing air after a period of time
After leaving the car off for a few hours, and starting it up, the AC always works 100%, the fans blow very nice cold air and it can last 20+ minutes. Sometimes it never stops working fully (yay) but ...
- 141
1
vote
0
answers
638
views
2008 Mini Cooper S (R56) A/C compressor won't run
I've been in the process of putting my 2008 R56 Mini back together after replacing the timing chain, vacuum pump, turbo oil lines, and oil filter housing gaskets. If you've worked on one of these you ...
CommunityBot
- 1
2
votes
1
answer
30
views
1997 Toyota Corolla, Hot Air Blowing into Cabin (non-AC model)
We have a base model (no AC, no options) manual 1997 Toyota Corolla that we are trying to keep alive long enough to teach the kids how to drive with a clutch.
Whenever there is airflow into the cabin (...
- 153k
1
vote
0
answers
103
views
Sixth Generation Toyota Camry - HVAC Defrost Mode Actuator Installation Instructions Needed
I am working on my car, which is a sixth generation Toyota Camry. She's been great to me..so far. Mine in particular is a 2008.
The issue pertains to the HVAC system. While hot (and cold) air does ...
1
vote
1
answer
238
views
Lexus RX 3500 2007 wet floor driver’s side
The floor in my Lexus RX 3500 2007 is very wet for some reason (on the picture it’s already dry).
Does anybody know what could be a reason?
- 153k
1
vote
0
answers
172
views
How to keep air recirculation on permanently
I am looking to find a way to have the recirculation always in the ON position for my 2018 Toyota Rav4 Hybrid Limited.
I understand it's unhealthy to leave the same air in your car but I don't ...
1
vote
2
answers
197
views
Does my refrigerant recovery machine have a leak if the vacuum is lost over several hours?
I'm attempting to do some DIY car repairs from my driveway, and need to remove the vehicle's AC condenser. To do so, I need to evacuate the r134a refrigerant from the AC system. Apparently it is the ...
- 956
0
votes
1
answer
47
views
AC starts cold, then becomes warm
2006 Ford Mustang - Ok so I've replaced the compressor clutch and accumulator. Every time the ac starts to blow cold the cooling fans turn on at the radiator and I can hear a click and the cooling ...
CommunityBot
- 1
2
votes
1
answer
93
views
What's going on with the "temperature" part of this pressure gauge?
Ok, I think I finally understand the pressure bit of this gauge that came with this set of poorly documented hoses I got off Amazon. From 0 to 350, it's actually measuring pounds per square inch (PSI)....
- 125
1
vote
1
answer
340
views
Help to diagnose A/C failure? Ford Tourneo with Forscan OBD
The A/C in my car doesn't work, before any repair, I try to understand which part in the A/C system is the problem.
Here the symptoms:
Everything looks fine: no error message, the interior ...
- 433
0
votes
0
answers
18
views
Top fans not working bottom floor fans working
Recently in a Honda CR-V 2011 the top fans stopped working but the floor fans are working. I’ve checked under the hood and both fans are running. It seems like changing the ac control options on the ...
- 409
2
votes
1
answer
507
views
No air coming from footwell vents. VW Passat
I'm facing a problem where no matter what button I press I can't get any air to go to the floor vents.
Whenever I press the according button air starts coming from the middle vents that's above the ...
- 41
0
votes
1
answer
76
views
Clicking sound on left side of dash possibly related to AC
So I got a new car some weeks ago. It's a Renault/Dacia Duster 2021. During the past week I took it on a long trip and reached the first 1000 km. During that trip I started noticing a clicking sound ...
- 101
2
votes
1
answer
713
views
Mercedes C200 (W204) air con not heating/cooling
I've got a Mercedes C200 (W204) from 2011 (facelift model) with a working air con (air blows out) but not getting cold or hot.
I've taken it to a local mechanic that in less than 1h diagnosed it as a ...
- 3,032
1
vote
0
answers
116
views
09 ford flex A/C is blowing warm, Compressor clicking on and runny,pressure on low side well over 100
AC worked fine find about a week ago and then just stop stop working, got a couple of cans of freon and Hooked up the connection and the pressure was showing very high very high almost to the top ...
- 153k
1
vote
1
answer
105
views
2017 Kia Sorento Dual Climate - how is it suppose to work
When I start my AC on low for both sides, air is blowing cold as expected. When I turn driver side up to say 72 degrees, it seems like the passenger side gets a little warmer but I don't think 72 ...
- 12.1k
1
vote
0
answers
239
views
A.C. compressor doesn't turn on
2011 Ford Escape 3.0 FWD.
System has charge, no leaks, new expansion valve. Compressor fuse was removed. When turning on the AC. The fan did not kick on and compressor did not activate. Both fans ...
- 153k
0
votes
1
answer
43
views
Abnormal Fan Switch Voltages?!? '99 Wrangler SE/TJ fan issues
So I've managed to get the blower motor out of my jeep, and while I'm gonna try to salvage the seemingly spent motor (more about this in a different question), the voltage being sent to the motor ...
- 12.1k
0
votes
1
answer
21
views
My Ac starts fine everyday runs cold for 40mins then goes into intermittent mode
Hi I have a 2012 VW Passat that has a faulty Ac it will run perfect first time you start the vehicle Ac will run cold for 40mins then suddenly it goes warm will come back on for a few mins then warm ...
- 3,032
3
votes
2
answers
7k
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
0
votes
0
answers
26
views
AC cools middle vents, remaining vents receive airflow but it is not cooled
In a 2015 Subaru Impreza, when the A/C compressor is powered on, the two middle vents blow air that was obviously cooled. However, the remaining vents (one on dashboard near drivers' door, one on ...
- 153k
8
votes
2
answers
2k
views
Vehicle AC works initially, but after driving for a while (hour+), the airflow drops to the point being ineffective
I have a 2004 Ford Excursion with the 6.0 powerstroke. Most the time, the AC works fine, but after a long drive in hot weather, the front AC barely blows out of the vents. The rear works fine, in fact,...
- 153k
9
votes
3
answers
6k
views
how can I quiet a 'chirping' ventilation fan motor blade?
I have a 2006 VW Golf and the internal fan motor that blows the a/c & heat will start to 'chirp' (sound something like a bird singing) randomly.
I believe the fan blade needs to be lubricated, ...
- 1
3
votes
2
answers
3k
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
1
answer
729
views
Is my car ac condenser clogged?
I hosed down the condenser in my car today to see if it improves my ac
What I realized is that the water didn't dry on some certain spots like the rest of the condenser.
The top and the sides were ...
CommunityBot
- 1
0
votes
1
answer
83
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 ...
CommunityBot
- 1
0
votes
0
answers
326
views
Can I apply dielectric grease to a blower motor resistor body?
I have a 2001 Camry (North America model) which (in)famously puts the open-body blower resistor in the ducting to cool it, which leads to enormous corrosion and burnout problems in humid/salty ...
- 1
1
vote
1
answer
2k
views
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 ...
- 1
0
votes
0
answers
54
views
Low pressure port on AC system read too high; compressor won't come on
my AC on a 2000 Nissan frontier has excessive pressure on the low pressure side . The compressor is also not coming on. Is there a high pressure switch that comes on the cuts power to the compressor ...
- 58
0
votes
0
answers
57
views
Automotive AC Diagnosis Chart / Resources
Has anyone found a good automotive AC diagnosis chart? I can find some suggesting pressure ranges, and even temperature and pressure ranges, but I cannot find a good source which also includes ...
- 2,115
0
votes
1
answer
38
views
Air control system in cabin
2016 Air distribution functions fine on passenger side. Drivers side only blows hot air. Have not tried anything yet. Want to make sure I am looking at correct component.
- 3,032
1
vote
1
answer
63
views
What happens if the AC evaporator ices over?
I am thinking of replacing the air conditioning evaporator temperature sensor in my 2011 ford fusion with a resistor, since the dash must be removed to replace the sensor. The warning that goes with ...
- 3,708
3
votes
5
answers
31k
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, ...
1
vote
1
answer
1k
views
Mazda5 - any way to disable "recirculation off while in defrosting mode" feature?
I have Mazda5 2013, trying to fix an annoying issue - every time I set air to blow towards windshield, recirculation is turning off - and there is no way to turn it back on if selector is still in the ...
- 1