Yesterday I went to a call, compaint was suction line was icing up. I got there and found several problems:
1.) The 3M Ultra Allergen filter they were using was dirty
2.) In addition to filter above someone had put filters in all the RAG's
3.) Almost all of the registers in the basement and first floor were closed.
4.) The system was about a pound low on Freon.
I checked the indoor coil, it was clean. I undid all the things listed about and when I left the indoor coil was fully refrigerated, I had proper superheat. Well....
I had to go there again today for the same problem, well the problem was that the contactor was permanently stuck in. I felt like **** and like a complete moron that I didn't catch that yesterday. This customer keeps a low set point on their t-stat (70 degrees) and I could almost swear that the o.d unit had shut off because I had to bypass the 5 min delay when I put it in heat to thaw the coil. I take callbacks as the ultimate humiliation and feel like I made a rookie mistake. Did I?