Notice the burnt out component in the red box vs. the shiny new one in the green box.

Clean the leads on the BQP2-4.7 of any residue to ensure a good connection to the new thermistor disc.

Reassemble the BQP2-4.7 by first inserting the leads, then pushing the disc between the connectors, and finally snapping the cover plate back on.

If you have an ohmmeter, check that you read about 4.7 ohms across the leads at room temperature.