Help
Trying to find out if adding/ top up R12a refridgerent in my 2000 blazer which a 134a will harm anything
.In Canada everything is labeled Do Not Mix Refrigerents.
Has anybody mixed the two


Do not want to dump the system
Just need to add a little as the system is not blowing cold .

Thanx in advance for any responses

Confused

 

do not mix Refrigerents. 35 yr. HVAC tech

 

First of all just as 10-78 edac said, do not mix. And second a 2000 should have R134a, unless Canada has different regulations. In the states everything after 1993 had to have R134a.

 

Thanx to all for the input.

 

Canada is more strict than US. Only AC shop can charge systems. Unlike US where individuals can get licenced to purchase refrigerant.
99% sure your compressor is leaking. HT6's are known 'belly leakers', as they leak between the 4 case parts. Aluminum oxide creeps between O-rings causing leaks.
GM corrected compressor problems for 2003 and up. If you want to go used...
To save money I installed new Sanden SD7 compressor, which is a one piece design, replaced radiator, condenser, fan clutch. This saved a lot of money!
Then took it to AC shop. They replaced Dryer, flushed evaporator and lines. Pressure tested with nitrogen and charged system.
System works great...

 

roddy

So you are saying it is illegal in Canada to charge your system with 12a, correct?

 

Mixing refrigerant types can and will cause serious damage to the system and possibly to yourself and/or others. Had a customer come in with the high-side line blown completely off of the compressor. This customer said that it sounded like a gunshot when it blew (the hood was closed at the time). He said that he and a neighbor added R12a to his 134a system.

 

Licensed? Huh, in the US any Joe Shmoe can buy R134a at any parts store, heck even WalMart, for less than $10 a can...

R12 is just simply hard to come by and if you're lucky enough to find an AC tech or shop that has some, it cost a pretty penny to refill, and is usually just best to convert to R134a at that point...

 

Not to threadjack, but how much did all this cost? I'm interested in doing the same once I get my girl up and running...

 

I personally in my driveway replaced my compressor, lines, condenser, dryer, and flushed my evaporator. Was about $350 worth or parts and a few hours work.

Not a project to undertake if you're not mechanically savvy though, which is why an AC tech can charge so much...