Hi all,

I attended a call to heating not working in an office today, a Mr slim split, the outdoor coil has a iced up quite alot, I dont suspect the unit is low on gas but I didnt notice it defrost while I was there either. The ambient temp was around 0 degrees.

Does this sound like a blocked coil? Or does it sound more like a defrost problem? I am back on the job tomorrow as today was just a quick visit before I left for home so havent carried out any tests as yet. Just thought I'd pick your brains on here first to help me out a great deal.

Cheers Guys