During my inspection today, I performed a routine maintenance check on the system. Everything today was working properly in the heat mode. I was unable to inspect the thermostat or any other vents inside because the customer had a dog that he didn’t want me to be around. Luckily, the indoor unit was in the crawlspace and the customer was able to operate the thermostat for me. The only item that I found that is highly recommended is a surge protection device for the indoor unit. The customer stated to me that they did not want to invest any more money into the system than what they already have. They’ve done a lot of work in the past four years since the system was installed and they said it has been nothing but problems. The other options I’m giving the customer the day or totally optional things like a water heater, flush and inspection and the dryer vent inspection. I have emailed the customer the check sheet and like I said, everything is operating properly today.