Diagnostic The tstat that we installed last summer is having an issue staying on. It goes out and then comes back on after resetting, but each time it goes out the AC cuts off. It's gone out many times today, and he's not exactly sure how many times it's done that. He caught it twice. He wonders if it's due to the bad weather today. On arrival unit was not operational. Checked safety switches. Found tricks safety switch. Primary drain line is clogged. Cleared drain line and checked for flow. Unit is operational. Cooling is restored.