A/C system on the low side?

Tiny
KSIPES04
  • MEMBER
  • 2017 HONDA CIVIC
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 167,500 MILES
After vacuuming the system down the gauges should read 0 correct on the low side? High side? When putting in refrigerant what does the low side gauge need to read at what psi? And on the high side is it between 200-250?
Monday, May 26th, 2025 AT 1:39 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,541 POSTS
After vacuuming the low side gauge should read 28-29 in of vacuum. Yep, the high side should be between 200-250 and the low should be between 35 and 55 the high pressure will be on a hot day. This is a great video to help you with the recharge.

https://www.youtube.com/watch?v=4EqdrBVb0sY

If the system does not hold vacuum do not charge it, the system is leaking FYI. Please go over this guide and get back to us.
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Monday, May 26th, 2025 AT 1:53 PM
Tiny
KSIPES04
  • MEMBER
  • 2 POSTS
  • 2017 HONDA CIVIC
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 167,500 MILES
While vacuuming the A/C system down what does the low side gauge need to read is it 0? High side? When adding refrigerant what does the gauges need to read once the system is full, low side? High side?
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Monday, May 26th, 2025 AT 1:54 PM (Merged)
Tiny
KEN L
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Please check out the response post above.
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Monday, May 26th, 2025 AT 1:54 PM

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