1. Remove the panels from the machine by following along with our guide: A53 Panel Removal

2. Disconnect the two wires of the temperature sensor by moving the orange sleeves out of the way and pulling the connecting points apart.

3. Remove the temp sensor with a 15 mm wrench.

4. Inspect the temperature sensor for scale build up or obvious wear. Clean or replace, then reinstall.
NOTE: It's a good idea to wrap the threads on the temperature sensor with a few layers of PTFE tape in order to ensure a good seal.
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If necessary, you can find replacement temperature sensors in our web store:
​Clive Coffee - La Spaziale Steam Temperature Probe