Central air help?

[WEJOXJ]

Apologies for the long post... but could use some help on this. Central air line into the house is freezing up again(81* inside). Guy that installed this thing gave me a "deal". I change the filter once a month or sooner like clockwork. I've read that it's either low on refrigerant or a plugged air filter (not the case). My blower is on right now but the unit is off to try and let this thing defrost. The more I read the bigger an idiot this guy seems to be. So a few questions:

Can or should I apply some heat to the line along with a hose out with the breaker off?

If there is a leak, shouldn't there be UV dye in the line so I can detect with light or glasses?

What can I do to get this to stop?
Thanks in advance.

 

[Frank Z]

A system that develops frost or ice on the evaporator or suction line can be caused by a number of things.

In no particular order:
Over charged.
Not enough heat available to boil off all of the liquid refrigerant in the coil.
Under charged
This takes a long time to ice up the coil.
Poor airflow
Dirty filter(s)
Dirty evap coil
Inadequate return air/poor duct design
Obstructed supply/return ducts
Improper indoor blower direction
Improper Installation
Too many possible issues to list


Need more info:
Make and Model # of the furnace, Evap Coil, & Condensing Unit
Square footage of the house
Pics of te installed system if you have any

 

[WEJOXJ]

Found the root issue, leak at one of the braised portions in the line. Refrigerant is low, very low, have a neighbor that knows how to do some of that. HVAC guy is evacuating the line fixing the leak, and recharging. It's a RUUD, 15 SEER, not sure of the model # being at work and all. Thanks for the help.

Just talked to the HVAC guy, he confirmed the leak with his sniffer. I was starting to think the SEER rating was too low, but he said it's ideal for my house.