Hot tub seems to run more

I've had a Viking II hot tub for over three years now, and have noticed in the last month that it runs more constantly that it used to. It has clean water, new filters and runs on 110 v. We keep it set at 103 degrees, and it is outside on a deck. Any reasons why it may be running more?

You may want to check to see if your spa cover needs to be replaced. A lot of the time as the cover wears out it will loose heat causing the spa to run more often to compensate for the heat escaping form it. You should also check the cabinet if there is any damage the spa can loose heat that way as well. The cabinet and the cover are designed to create a barrier from the outside elements.