I've been stick and MIG welding for years at the hobby level. I wanted to get into TIG welding so I bought a Dialarc HF 250 with the Coolmate 3 on top. I just now got it all set up and put new antifreeze it the Coolmate. When I turned everything on, the flow meter on the Coolmate spun up and then stopped. So, does the flow only happen when I am actually welding something or should it be spinning all the time. Thanks for your help. Dennis.