Stopping the NonStop Vac

Jordan Fletcher
Jordan Fletcher
• 1 min read

D&S Vacuum

A common problem that most car wash owners will eventually encounter is with vacuums that won’t shut off.

The nonstop vac problem will always be one of two possibilities:

1) The timer is bad or malfunctioning, or

2) The mercury contactor is bad

To discover which part is bad, test for voltage with a VOM on the coil of the mercury contactor. If there is no voltage across the coil, then the contactor is bad.

If the mercury contactor has voltage, then the timer is the culprit. You can then proceed with the repair.

Related Posts

Tech Tip Center

It’s Time to Winterize Your Car Wash!

Brrrr! Outside temps are already plunging as fall heralds the deep freeze that winter will bring. Be sure your car wash system stays in top notch condition during the winter months by putting these important system checks, courtesy of our friends at Car Wash Boilers, Inc., at the top of your “to do” list! Inspect […]

Tech Tip Center

How Often Should Cars Be Waxed?

Tech Tip Center

Car Wash Pump Maintenance Basics: Keep the Oil Clean!

At the heart of all car wash high and low pressure systems is the pump. You can maximize the performance and longevity of your pumps by keeping them well maintained with fresh oil. How often should I drain crankcase oil in my car wash pumps? Here are some general guidelines, check with your pump manufacturer […]