Bosch Wvt1260 Washer Dryer..no Heat On The Drying Cycle

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Bosch WVT1260 washer dryer has no heat on drying cycle

The problem

On a Bosch WVT1260 washer dryer, the drying cycle runs and the drum turns, but there is no heat. The dryer fan motor is not running, although water is trickling into the condensation chamber normally.

Likely cause

The accepted diagnosis was that the heater circuit likely has no neutral return, despite live voltage being present at both sides of the heating element. A further possibility raised was that the machine may be inhibiting heating because it detects water still in the machine.

What fixed it

Recommended action was to isolate the appliance from the socket and check the heater circuit with a continuity meter, specifically for loss of neutral return. The discussion also suggested checking whether the machine is falsely sensing retained water, which could prevent the heater from being energised. No exact repair was confirmed in the thread.

Checks to try

• All 3 thermostats/cut-outs checked OK
• Heating element measured 35 ohms
• 240VAC present on both sides of the heating element
• Dryer motor not running
• No 240VAC on either side of the heater motor starter capacitor
• Water trickle into condensation chamber OK
• Drum turning and drying cycle appears to run

Parts or tools mentioned

• Continuity test meter