- Dec 3, 2010
Last year I had my A/C unit serviced and it needed a top up of freon because it wasn't cooling properly. The technician also put in UV leak detection dye into the unit. The unit worked fine all summer and I didn't need to call the technician back. Last week I turned on the A/C for this first time since last year. Same problem as last year - unit was cooling but not very cold, and could not cool to 75 degrees with outdoor temps in the 80s. Will the UV dye still show where leaks are or will I need to get another UV dye test?