Arrived onsite to provide estimates for an annual tune-up and to investigate issues with the aquastat and circulator pump. The customer reported that the aquastat was not functioning. Upon inspection, I found it to be rusty and corroded. They also mentioned that zone L gets hot even when there is no call for heat. Based on my assessment, installing a heat check valve would likely prevent heat migration in that zone. Provided estimates for the recommended repairs, and the customer would like time to consider their options.
