There can be lots of causes for this, but an amperage variance is often the offender. It can be caused by the air needing additional Strength to operate as a result of clogged filters. They been serving our company's HVACs for just a several years. They been attentive to us, https://custom-duct-work-in-elk-g62840.blogpostie.com/39872068/getting-my-home-furnace-installation-in-folsom-to-work