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Discussions / Central Vacuum Air Vac AV850 by M&S Systems

« Last post by Breaktru on May 16, 2026, 03:23:45 PM »

My Air Vac AV850 recently needed a replacement control board. Unfortunately the board is no longer available. This Air Vac is over 40 years old and I have replaced the twin motors two times as well as replacing the motor brushes a few times. Customer service for parts sites are useless in helping out. The original system was 220VAC and the motors are control via 110VAC.

I had an idea and wasn't sure it would work. I removed the 220VAC line and replaced it with a 110VAC power cord 12 gauge, plugged into a 20A outlet that is on a 20A circuit breaker. I removed the original board and bought a 110VAC board and installed it. Everything is working great now.

This is the new board: Vacuum Motor Circuit Board for Dual Motor / 28 amp 120v part # M-CB2MTR28A from Central Vacuum OnLine or Part #235L from Built-in Vacuum Systems MD.

This is my Air Vac and old control board:

Discussions / Battery Maintainer for Chevy Colorado / GMC Canyon

« Last post by Breaktru on October 27, 2025, 02:47:55 PM »

I don't drive my truck everyday so letting it sit for a few days drains down the battery.

When battery becomes low I noticed the remote start does not work on the app nor the FOB. Also the auto-stop doesn't work or the Over The Air (OTA) updates.

It was a pain to pop the hood when I needed to plug in my Noco Genius 5 so I decided to hide the AC plug in the grill rather than installing a bulky AC outlet and damage my grill.

See video below......