I have had a Marquis Promise for almost three years and love it. My wife particularly loves the microsilk option. Unfortunately I now have a problem with it, When running microsilk it only produces bubbles for about 10 seconds. The pump continues to run but no bubbles come out.
I opened the side up to investigate and am 90% sure I have identified the problem. There is water in the air intake line for the microsilk pump. When you turn on the microsilk pump, you can see the water in the airline being drawn towards the pump, but it never pulls it all the way down. I tried to pull the tubing off at the air intake fitting but it was on so tight I could not get it off. The other end of the tubing appears to go to the microsilk pump on the intake side, but it is concerned in spray foam and I can’t get to the fitting where it connects.
Any suggestions on what to try? Would draining the hut tub clear this line? Thanks for your help