AC Not Cold Due to Pressure Hose Leak on Nissan Altima

Problem Description and Possible Solution

The AC system may blow warm air due to refrigerant loss caused by a leaking low pressure AC hose. These hoses commonly develop a leak at the hose crimp connection.

Problem Data
RepairPal Verified
Average mileage: 104,826 (18,000–250,000)
13 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
149 people reported this problem
Viewing 1 - 20 of 78 comments
Heat works only when moving and air conditioning blows whatever temperature is outside
A/C not cool. Replaced pressure hose.
the ac just stopped blowing cold air
A/C blowing outside temp, not cold anymore.
I had a new engine put in my car in 2010 due to an engine recall and every since my car has not been the same. My air conditioner is blowing hot air I had it serviced but now Nissan is claiming I need to put over $1200 to get new hoses but I refuse to put another penny into this car. I will never purchase another Nissan!
replaced pressure hose...$400
Ac problem, hat air
Looks like a tiny pin prick hole near the crimped area.
Ac blowing hot air!
A/C Low pressure line leaking. Estimate cost to fix 350
Both hoses are leaking...
Leak detected at front connection using blacklight detection.
a/c hose gone bad
Low pressure AC hose leaking. Still waiting for it to be replaced.
Leaks inside passenger glove department
Coolant leaking
I had to replace the hoes. AC wasn't blowing out cold air
Freon leaking out by crimped areas on hose
I have had this problem for a few years now and decided to look at it. Long story short, low pressure hose had a pinhole where it was crimped. I just put some self-sealing 3M tape on it and refilled my "refrigerant". It got me through the summer but now it's leaking somewhere else. I'll probably just continue to refill the refrigerant. For the cost, it's going to be better than replacing it with another $200 OEM hose. I'm never selling the car so I might as well just wrap all the leaks with that self-sealing tape. That stuff is magic.
I have not solved it, but the car usually blows slightly cool air even when it is set to Max A/C.