How cold is your Air Con

Re: How cold is your Air Con

Postby hvac guy on Wed Dec 04, 2013 5:18 pm

Any losses from the r134 have been recovered from fitting of larger evaporators, i think the biggest problem is from installation ie no condenser fan and running the liquid line next to the exhaust this would push the the subcooling into gaining heat not losing heat which would then cause higher saturation temp in the evaporator and then losing Refrigeration effect to the point where poor T.D across the evaporator would be giving u higher supply air temps and higher humidity. One day i will do a chart and see

R22 has not be phased out yet just the amount available for import into Australia it will be phased out by 2020
u can get drop in replacements for this gas and r12, a great drop in for r12 was sp34e or 34m both worked well.

R410a is next to be phased out replacing it will be r32 which is known to be flammable :?

i think the euro cars are trying out carbon dioxide atm the biggest problem is the pressure that this gas operates at :o one crash and boom.

U can thank the carbon tax for that price Bigbirdalx, i,m trying to find some r123 to repair a chiller. min order is about $20k :evil:
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Re: How cold is your Air Con

Postby Bigbirdalx on Wed Dec 04, 2013 5:50 pm

We just put 300kgs into a power pax chiller of r134a...glad i didnt foot that bill
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Re: How cold is your Air Con

Postby Longranger1 on Wed Dec 04, 2013 7:14 pm

R32 apparently is the next big thing in smaller A/C units. Already used as a blend in R410A (50/50 with R125?). Supposedly more efficient. Some units are already being sold with it.

Not sure about some of the new flammable gases. I know the quantity isn't great but a leak in a confined space coupled with an ignition source could spoil your day.
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Re: How cold is your Air Con

Postby Morgs n Jess on Wed Dec 04, 2013 9:52 pm

NowForThe5th wrote:Meh. What you need is a proper fan. Like this:

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Is that a ford fan or just an aftermarket job 5th?
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Re: How cold is your Air Con

Postby Cowboy Dave on Wed Dec 04, 2013 10:11 pm

Might be a Pajero I think mate.
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Re: How cold is your Air Con

Postby Homer on Thu Dec 05, 2013 6:54 am

Longranger1 wrote:R32 apparently is the next big thing in smaller A/C units. Already used as a blend in R410A (50/50 with R125?). Supposedly more efficient. Some units are already being sold with it.

Not sure about some of the new flammable gases. I know the quantity isn't great but a leak in a confined space coupled with an ignition source could spoil your day.


Most of the 'new' flammable gasses are the oldest around...basically propane with additives. This one is just the usual chemical company rubbish along with 134, 410, 407 etc :roll:

Probably the best refrigerants available now are the propanes - and certainly the most environmentally friendly and sustainable.

There's a bit of a stigma about the flammability of these propane based refrigerants. I can understand why as 300 grams of propane in your AC system is certainly frightening when compared to the 80kg bottle of propane in the boot of the taxi :lol: :lol: :lol:

Same goes with the gas piped into all our homes for heating and cooking...

Sometimes it pays to step back and have a think about things in perspective...or not :lol:

Most/many domestic refrigerators sold today run a propane derivative ;)
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Re: How cold is your Air Con

Postby Longranger1 on Thu Dec 05, 2013 8:40 am

In that context lp gas in the boot isn't a worry. Propane has been used for years for fuel and as a refrigerant.

Likelihood of a problem... Negligible. Probability of shit happening in the event of a leak depends on the environment. I would prefer not to have it in certain locations for marine applications.

I have seen some petrol inboard boats that would give you nightmares. Floating bombs.

It all comes down to the expertise of the installation and the vigilance of the operator and both can fail spectacularly.
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Re: How cold is your Air Con

Postby cnswilly on Thu Dec 05, 2013 10:03 am

Another option for those looking into refrigerants could be this?
http://en.wikipedia.org/wiki/1,1-Difluoroethane
R152a?
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Ml air conditioner help

Postby jrad on Tue Dec 31, 2013 9:00 am

I was driving my ml yesterday and when I pulled up the air con went hot at idle. When I rev the car or drive it comes back cold again. Has anyone experienced this or know what the most likely cause would be. I have checked to see if the belt is loose but it seems fine.
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Re: Ml air conditioner help

Postby fridgie on Tue Dec 31, 2013 9:45 am

There's already a fair bit about this in other threads mate, didn't really need a new one for it ;-)

Basically, the clutch fan draws air over the condenser, when this cycles on a hot day when idling the air conditioner loses efficiency and is basically useless.

Have a search for 'thermo fan' and you should find the best solution ;-)
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Re: How cold is your Air Con

Postby 4wd26 on Sat Dec 27, 2014 6:22 am

Just read all this thread
My air has gone real warm since being off the road for 5 weeks, really noticeable
It is coldish on driver side but blowing warm air on passenger side, but even the driver side is hopeless- and it was heaps better

Thinking it may have lost gas after sitting- any checks available for levels, do it yourself diagnosis?

Other than that I may have to take the dash apart and see if something has slipped- vent tube?

I have washed out the condenser/ radiator

Need to check the belts

Anything else to check for
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Re: How cold is your Air Con

Postby fridgie on Sat Dec 27, 2014 6:44 am

No way to tell gas charge without gauges, which I have (as well as the gas - ml has a 550g charge of r134a)

Sadly I don't have a vac pump available atm otherwise would be happy to sort it for you.

Should have all gear needed after the 5th Jan ;)
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Re: How cold is your Air Con

Postby NowForThe5th on Sat Dec 27, 2014 6:51 am

Dryer should have a sight glass in the top. Bubbles visible usually means low on gas but it's only an initial indicator. Different temps side to side would indicate a problem with the vent tubes.
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Re: How cold is your Air Con

Postby Bigbirdalx on Sat Dec 27, 2014 8:38 pm

4wd26 wrote:Just read all this thread
My air has gone real warm since being off the road for 5 weeks, really noticeable
It is coldish on driver side but blowing warm air on passenger side, but even the driver side is hopeless- and it was heaps better

Thinking it may have lost gas after sitting- any checks available for levels, do it yourself diagnosis?

Other than that I may have to take the dash apart and see if something has slipped- vent tube?

I have washed out the condenser/ radiator

Need to check the belts

Anything else to check for


Some of us real fridgies have 134a and vac pumpz on them
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Re: How cold is your Air Con

Postby fridgie on Sun Dec 28, 2014 7:05 am

Is that a dig at me you bastard? :lol:
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Re: How cold is your Air Con

Postby Bigbirdalx on Sun Dec 28, 2014 8:49 pm

fridgie wrote:Is that a dig at me you bastard? :lol:


Could be ;)
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Re: How cold is your Air Con

Postby mad992 on Mon Dec 29, 2014 5:40 pm

cmon now you two overpaid filter washers :lol:
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Re: How cold is your Air Con

Postby Lunny on Mon Dec 29, 2014 6:13 pm

mad992 wrote:cmon now you two overpaid filter washers :lol:


lmao...
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Re: How cold is your Air Con

Postby fridgie on Mon Dec 29, 2014 8:05 pm

Lunny wrote:
mad992 wrote:cmon now you two overpaid filter washers :lol:


lmao...

Laugh all you want, I just got an 8.5k/yr payrise :twisted:
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Re: How cold is your Air Con

Postby Lunny on Mon Dec 29, 2014 8:36 pm

fridgie wrote:
Lunny wrote:
mad992 wrote:cmon now you two overpaid filter washers :lol:


lmao...

Laugh all you want, I just got an 8.5k/yr payrise :twisted:


how are your knees lol :lol: :twisted: ;)
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Re: How cold is your Air Con

Postby Naff on Tue Dec 30, 2014 6:01 am

Lunny wrote:
fridgie wrote:
Lunny wrote:[quote="mad992"]cmon now you two overpaid filter washers :lol:


lmao...

Laugh all you want, I just got an 8.5k/yr payrise :twisted:


how are your knees lol :lol: :twisted: ;)[/quote]
He did post a picture up of calluses on his hands..
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Re: How cold is your Air Con

Postby fridgie on Tue Dec 30, 2014 7:08 am

Naff wrote:
Lunny wrote:
fridgie wrote:[quote="Lunny"][quote="mad992"]cmon now you two overpaid filter washers :lol:


lmao...

Laugh all you want, I just got an 8.5k/yr payrise :twisted:


how are your knees lol :lol: :twisted: ;)[/quote]
He did post a picture up of calluses on his hands..[/quote]
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Re: How cold is your Air Con

Postby Bigbirdalx on Tue Dec 30, 2014 7:12 am

Just remember ladies. Who do you call when 24c is unbearabley hot and uncomfortable
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Re: How cold is your Air Con

Postby fridgie on Tue Dec 30, 2014 7:32 am

Or to tell you how to make it heat in winter
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Re: Airconditioner cool not cold

Postby SLIMaxPower on Wed Feb 25, 2015 5:40 pm

rodeddy wrote:hi,
I used the std pipe insulation i got from a air conditioning guy.. I had to cut it in half and slip over the pipe. Fits nicely.
I was going to clark rubber to get some as the stuff they have seems ok too - as long as its not the really cheap foam type , as seen in the pic...

this is the really cheap foam type that had melted from the radiant heat....
Click to view larger picture

this is another pic of the cheap foam type...

Click to view larger picture


this is the better stuff fitted....

Click to view larger picture

Any ideas where I can source some of this in Perth.

cheers, Rod :D

GLRkenny wrote:What type of insulation did you end up using rod?
Any pics?
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