How do I change the Bridge Rectifier on my Onan?
The Onan typically fails while turning it off while the AC is running. A voltage transit is generally the cause of failure due to the fact that the OEM Bridge rectifiers are operating very near to the Peak Inverse Voltage (PIV) rating of the OEM Bridge rectifier. A simple solution is to replace the OEM BR with one of much higher rating. However, I have not been able to find any aftermarket BR w/the same pin-outs. A simple modification to the base (holding device) is capable to accept the four wires as feed thru(directly attached to the terminals of the BR). A 1/4″ hole in the base for each wire is all that is required. To remove the BR, side out the Onan as far as you can & remove the BR mounting screw which is located aft of the Control Board on the rear Generator Housing (1/4″ screw head). Remove the plastic cover on the side of the generator housing & the BR can be moved to where you can ID the terminal from the side of the BR. Carefully…Carefully….Carefully transfer the termina
