The water pump on my StarCraft Launch started acting funny this last trip. Water pressure was fine, but pump would cycle on every 30 seconds or so for just a brief second. Other than the annoying sound every of it constantly cycling on it worked when I needed it. After being home a few days I turned it on again today and it pumped for about 15 seconds before enough pressure built up to shut it off. After that it worked fine and didn't cycle on every 30 seconds or so like it did last weekend. Any thoughts? Thanks in advance for any input.
wnjj wrote: You had some debris in the pump diaphragm which acts as a check valve. When it leaks the pressure drops and the pump runs. The “leak” sends water back into the tank. If it’s working now it likely cleared itself up.
How is the supply line from the tank plumbed? I ask because it sound like it's losing its prime. Manufacturers ignore pump installation guidelines and place them way too far from the tank. My last TT had a horizontal run of about 15' and would not hold a prime. I liken it to holding your finger on the end of a straw full of water and then turning it horizontal. The water will run out. I moved the pump directly over the tank and never had a problem again.
Other possibilities are that it has sucked debris up. If so, take the head of the pump apart and rinse all the parts off. Reassemble and it will be good. Or it could be you have a leak someplace or the water heater is dripping from its TPO valve.
You had some debris in the pump diaphragm which acts as a check valve. When it leaks the pressure drops and the pump runs. The “leak” sends water back into the tank. If it’s working now it likely cleared itself up.
