I have an OLD Lennox model HS6-311-13FFC that runs but is not very cold. For example I noticed it took over 1 or 2 hours for me to notice my thermostat to drop 1 degree. I observed the condensor outside and it seems it is not cycleing on or off (it runs continously). I am wondering if this is normal since this was built during the 1980's ? I looked at the line to my evaperator core and noticed there was frost on one of the lines and was wondering if this is normal too? Here is a quick summary hopefully it helps out:
Outside ambient air temperature: 71 degrees
Inside home thermostat: 74 degrees
Time taken to drop 1 degree: about an 1 or 2
Evaperator Coil: One line frozon
Am I low on refridegerant? I had the tech come out today, he didn't hook up a gauge to check pressure, I noticed he put some measuring device near the compessor to check the temperature. He said everything seems fine. If I leave this running I think it'll run 24x7 without any temperature change and the condensor outside will continue to run continously...