Returned from long vacation to find one of our Lennox central air units wasn't blowing any air, despite me being able to hear the blower motor. Called them to schedule a service call to replace the blower. Kevin asked some questions then instructed me to check outside for ice on the compressor line. Sure enough, there was a grapefruit sized glossy snowball of ice on the line despite it being 100 degrees out. Kevin said I don't need a service visit to get it running again. Told me there's probably 6" of ice on the coils inside the air handler so I merely needed to turn it off for 3 hours, then turn the fan from auto to on for 30 minutes and everything will be fine. He was right, it was.
Kevin explained that it froze up with the storms we've had here and the sudden rise in humidity. That a contributing factor was my too restrictive & dirty air filter from Home Depot. And / or that I might be low on coolant. He also explained what kind of filter to get instead of the ones we had been using.
I had Kevin out a week later as a follow-up and recharged the coolant which was low.
So, we'll be using Kevin from now on for all of our service & repairs. Will give him our business too when it is time to replace our 15 year old systems!