Have my family member latio air con blowing hot air fix at Kelvin's workshop last week.
This is the 2nd time visited Kelvin workshop.
The 1st time car has a "pop" sound heard when releasing the break, went back to Nissan, after 5 hours leaving the car there, problem not fix and told to monitor.
Next day immediately went to Kelvin / Ah Lim, they solved the problem within 2 hours. Thanks to both of them.