Carpet cleaner will not power on, display is blank, no motor or pump noise

Safety first: Unplug the Husqvarna carpet cleaner from the wall outlet before any inspection. Never work on a live appliance.

• Check outlet and cord: Plug a lamp or another tool into the same outlet to confirm power. Inspect the Husqvarna power cord along its length for cuts, kinks, or burn marks. If the molded plug is warm or deformed, discontinue use.
• Test the power switch: Access the handle or top housing (depending on model). Remove screws and carefully lift the cover. Use a multimeter in continuity mode across the power switch terminals while toggling ON/OFF. Replace the Husqvarna power switch if there is no continuity when ON.
• Inspect internal line fuse: On many Husqvarna carpet cleaners, a small glass or ceramic fuse is mounted on the main control PCB or in an inline holder. Visually check for a broken filament or discoloration. Test with a multimeter; replace only with the same rating (amperage and type).
• Check PCB for damage: Look for burnt spots, bulged capacitors, or cracked solder joints on the main board. If present, the main PCB assembly should be replaced rather than repaired in the field.
• Reassemble and test: Refit covers, ensure no wires are pinched, plug in, and test power. If the fuse blows again immediately, disconnect and seek professional service as there may be a shorted motor or pump.