Bosch hob repair in Riga — SATER

Bosch induction hobs with FlexInduction technology — PXX and PXY series — allow two adjacent zones to be linked into a single large heating area for oversized cookware. The electronic heart of these hobs is a set of power IGBT transistors (Insulated Gate Bipolar Transistors) that convert mains voltage into high-frequency current for the induction coils. IGBT modules are the most common point of failure: overheating due to inadequate cooling, mains voltage spikes, or natural wear after 5–8 years of heavy use. The symptom is straightforward — one zone stops heating while the rest continue to work normally.

We test each IGBT transistor with an oscilloscope and multimeter, identify the exact failed module, and replace it. In parallel we check gate drivers, current sensors, and resonance capacitors — an IGBT blowout often triggers a chain reaction that damages adjacent components. On FlexInduction hobs we also verify the zone-linking switching logic; if the Flex function does not work after an IGBT swap, the cause may lie in the control processor or its firmware. Component-level repair costs a fraction of replacing the entire power module. All work carries a 3-month warranty.

The ceramic glass surface on a Bosch hob is not just protective glass — it is a functional component: beneath it sit capacitive touch electrodes (for control), infrared heaters (on ceramic PKE models), and induction coils. Ceramic glass cracking from thermal shock is a common issue: hot cookware placed on a cold surface, ice-cold water spilled on a heated hob, or an accidental knock with a heavy object. Operating a hob with cracked glass is strictly unsafe. We order original glass through BSH suppliers and carry out the replacement with full re-sealing and testing of every zone after installation.

The touch control panel on Bosch hobs works on a capacitive principle — electrodes beneath the glass detect changes in capacitance when a finger touches the surface. Problems arise when moisture enters beneath the glass seal (cooking condensation), when ribbon-cable contacts oxidise, or when the electrodes themselves are damaged by overheating. Symptoms include a completely unresponsive panel, phantom self-activation (ghost touches), or selective response to some buttons while ignoring others. We inspect the seal, clean and reconnect the ribbon cable, and replace the sensor module if necessary. In most cases the problem is resolved without replacing the entire control panel assembly.