Arrived for a first time visit for a non op Lennox heat pump. Client told me last night they system refused to kick on despite then thermostats calling for cooling. They have a 3.5ton Lennox heat pump with 3 zones. Once in the attic I found the secondary drain pan was filled to the brim and the aqua guard thankfully shut the outdoor unit off to stop the system from accumulating water in the drain pan. I found the outlet for the drain. I pumped it out and made an adjustment with the clients approval to avoid it getting it buried in mud again. We walked the neighborhood and there was a considerable amount of homes with the same similar adjustments made. I tested operations and spoke about homecare but settled on the service call and repair cost for today. System is fully operational in all zones and dropped the indoor temp while I was there from 86 to 81 degrees. We vacuumed out the secondary pan, changed their filter and ensured the system was running as designed with a 20 degree temp s