Community Forums

crusader62 · 10-13-2021, 03:01 PM

Hi, I have a used Roadmaster ADDaBrake 8800 I am testing it, and I plug it it and compressor runs then stops withing a minute. I am able to adjust the air pressure just fine. The instruction say to press the test button and the unit is supposed to cycle 3 times as it presses the brake pedal. Nothing happens. I did test the breakaway switch. As soon as I pulled the pin, the ADDaBrake started up, but did not push the pedal. Any ideas what issue might be?

Thank you.

Kerry

wolfe10 · 10-13-2021, 03:07 PM

Have you called Roadmaster? They have some pretty good troubleshooters.

crusader62 · 10-13-2021, 05:12 PM

Hi Brett,

Thanks for responding. Yes I called. They said its an old model and that it might be control board. Did not off any other suggestion. I opened unit up and it is very clean. Nothing looks out of place.

Isaac-1 · 10-13-2021, 08:46 PM

The Add A Brake is a rather old unit I think they were discontinued about 12 years ago, if I were to guess maybe something has went wrong on the control board, a common failure item on aging electronics are electrolytic capacitors going bad.