This is a technical guide based on the standard maintenance procedures for Beta 3 series pressure washers.
If the speaker cuts out after 10 minutes of high-volume use, the output transistors/MOSFETs are overheating. Remove the PCB, clean off old thermal grease, and apply fresh compound to the aluminum heatsink. 🔧 Disassembly & Mechanical Service Beta 3 U15a Service Manual