That is the low pressure. You need to get a set of gauges to monitor both sides.
You can rent a set at a parts store or buy a set at Harbor Freight for about $30.00.
Then we can get accurate reading and help you out.
150 on the low side is excessive. Was any Freon added prior to this?
Was the A/C working correctly before?
Were there any parts replaced?
Friday, June 8th, 2018 AT 11:20 AM