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Written by
Edited June 16, 2021
at 09:29 PM
by
Was browsing Walmart clearance section and came across a few of these. Less than half Harbor Freight prices. Several brands to choose from. Not top tier, but should be fine for occasional use...
https://www.walmart.com/search/?q...0%26%20Low
https://www.walmart.com/ip/Biltek.../169192025
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The unit for $23.99 only provides reading for R12, R22, R502.
R12 and R22 were used in old-school ac for home and auto.
R502 is also older refrigerators.
Newer window unit use R410a
Present cars use R134a
As of 2021 and future cars will start using R123yf
So the point being most of those dials beside psi are useless unless you are still using old-school ac system.
Another point being with the new standard for auto Freon there will be more sales coming in near future. Make sure the unit you purchase, at least, shows R134a readings.
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Thanks OP. I paid ~$33 for mine on Amazon, this is a decent deal for sure,
none of these look to have a charging port purge/burp point
https://www.walmart.com/ip/Manifo...gn_id=
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https://www.walmart.com/ip/Manifo...gn_id=9383 [walmart.com]
https://www.amazon.com/Ziss-Diagn...B07FZR7
edit: 'in stock soon'
Depending on the age of the car you may be able to get a reading by plugging in an ODBC computer - many parts stores have free loaners.