Common methods for repairing a carpet shampooer include cleaning the carpet brush, unclogging the filter, reinstalling the water tank and replacing the pump belt. Exact troubleshooting steps vary depending on the brand and model of the carpet cleaner.
If the brushes are not rotating, check to ensure they aren't loose or damaged, replacing them if necessary. Keep in mind that the brushes may not rotate if the machine is in an upright position. Check the pump belt for damage by unplugging the shampooer from the power supply, releasing the access door and removing any other screws or pieces to view the belt wrapped around the motor shaft. Purchase and install a matching replacement part if the belt appears worn or loose.
If the carpet shampooer is not spraying or is losing water, check to ensure there is still sufficient cleaning solution in the tank, and adjust the attachment hose, if needed. Check the filter, and clean it if it's clogged. If the machine is receiving no power, find and press the reset button. If this doesn't work, try another wall outlet or reset the circuit breaker. Avoid opening the machine for internal repairs if these troubleshooting steps don't work as this can void the warranty. Instead, call the manufacturer or a qualified repair technician.
Major brands, such as Bissell and Hoover, typically provide customers with a tool via their websites that allows customers to search for service centers within a 100-mile radius of their zip codes, although other distances are available. Upon entering the zip codes, the tools generate lists of service centers, listing them from the nearest to the furthest.