Float must be in lowest position. If fluid is lower inside filter, drain tank and remove and clean filter. Move float up and down to see if pump will turn on. Pump tries to run and then blows circuit breaker -Check power cord for frayed, cut, or worn spots. If below 105 volts, pump will not work.
Pump starts and stops -Check for dirty ultra filter.
Water level should be the same inside and outside of filter. Water dripping from bottom of machine exhaust -Check machine tank for excess foaming. Open machine top cover and let vacuum ruin for 10 minutes to dry out vacuum motor, then close lid and resume cleaning. Vacuum hose or tool leaks -Leave vacuum running for 1 minute when finished cleaning to clear hose. Inline strainer is properly tightened and fluid hose connectors are fully seated.