No, you cannot directly replace R404A with R134A, as they have different properties and applications. R404A is a blend designed for low-temperature refrigeration, while R134A is typically used in medium-temperature applications, such as automotive air conditioning. Using R134A in a system designed for R404A could lead to inefficiency, inadequate cooling, and potential damage to the system. Always consult with a professional technician before making refrigerant changes.
R134A, R22A, R404A, R410A and many more
No r404a is not compatible with r409a, r134a and 404a use the same lubricates and are compatible but r409a use a different lub making them incompatible
No, there is retrofitting required.
No
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It's only Freon if it was manufactured by DuPont, but to the important things... Your 89 would have had an R12 system from the factory. You can't use R134a in an R12 system unless you do at least a partial retrofit (evacuate all the R12 and compressor oil, replace the orifice tube, replace the accumulator, replace the hose connections, add PAG oil and R134a).
No
An R12 system must be retrofitted to be made compatible with R-134a.
it depends on the gas you are using. for ex\mple r134a and r22 you charge vapour through the low side and some gases are liquis charge only r404a r409 r407c and others these you charge carefully and slowly as liquid through the low side.
No, R134b and R134a are not the same refrigerant, and R134b is not a direct drop-in replacement for R134a. While both are similar in terms of their chemical structure, they have different properties and performance characteristics. Using R134b in a system designed for R134a may lead to inefficiencies or damage. Always consult the manufacturer's specifications before making any refrigerant substitutions.
No. It is illegal, will not work properly and R12 Freon is not available for the public to buy anyway.
R134a is a refrigerant gas