Dan,
Is it the model RWC2000?
Here are descriptions of the various models if you do not know which you have this may help: Call me if you are stumped.
Series RWC-1000 are stationary mounted controllers, intended for remote control of stationary electric pressure washers, using either 1 or more chemicals and rinse water, hot or cold. Various arrangements of control logic, antenna, and status annunciator are available. These are direct plug-in to electric PW that have the industry standard MS series Amphenol © style connector. Wiring adapters are available for machines not having the Amphenol © style connector.
Series RWC-2000 are intended for remote control of mobile trailer mounted pressure washers with gasoline engines, using either 1 or more chemicals and rinse water, hot or cold. Various arrangements of control logic, antenna and status annunciator mounting are available. These are direct plug-in to PW that have the industry standard MS series Amphenol © style connector. Wiring adapters are available for machines not having the Amphenol © style connector.
Series RWC-3000 are OEM PRODUCTS, intended for remote control of stationary pressure washers, using either 1 or more chemicals and rinse water, either cold or boiler fired hot water. Various arrangements of antenna, status annunciator(s), and control logic are available.
Series RWC-4000 are OEM PRODUCTS, intended for remote control of mobile trailer mounted pressure washers, using either one or two chemicals and rinse water, either cold or boiler fired hot water. Various arrangements of antenna, status annunciator(s), and control logic are available.
Series ACC-1000 are accessories and repair parts for the above products, such as remote antennas, universal machine cable adapters, remote annunciators, replacement machine cables, and replacement transmitters.