10 years ago they kept telling us that replacing R12 a/c system with 134 gas was not recommended because will destroy the compressor and so on, I have retrofitted all my vehicles to 134A with no negative consequences ,so I believe it can be done Just have to evacuate the system totally and remove the oil from the condenser,evaporator and receiver dryer(Filter) and add the recommended oil for 134A gas .
Refrigerators use magnets on the door the keep the cold air in, Same with the freezer door.
Any amount would be a contamination. Charging with clean R410a does not introduce POA oil, which is where a serious contamination would occur. Mixing R410a without oil will simply render that amount of charge in your system as ineffective. To answer the question how much contaminates, it could be seen on a sliding scale, a very small amount, say a couple ounces, probably will not see a noticeable change. A pound, and you would likely notice some changes in performance related to temps. of evaporator as well as the amount of liquid refrigerant its producing to send to the evaporator. As you increase the ratio of R410a to R22, you would only see incrementally worse performance as the compressor is not producing the pressure required to get any use of R410a. If you had somehow introduced R410a with its oil, their would be a serious reason to pull the entire charge, flush the system, and start clean. The oils of R22 and R410a are %100 not mixable, they will be rendered useless, and system damage will occur shortly.
overall
You can use eggshells or shells
a blow dryer
After 1992- r134A Before 1992- R22 but it need to be retrofitted for R134 if it hasn't been done already. It is ILLEGAL to use R22 in autos.
No use R22. R134A is for automotive applications.
R134a
R134a
Most home systems use r22 which requires a license to purchase. The only refrigerant available to the consumer is automotive r134a.
It takes r134a refrigerant.
R22
if approved by the compressor manufacturer, then yes, if not, then no...
R134a
R134a
R134a
r134a