Here is illustration on how to remove and install heater/air conditioning controls for JCB 416 wheel loader.
1 Make the machine safe with the loader arms lowered.
2 Pull the heater/air conditioning control knobs B and remove them.
3 Loosen their securing nuts C.
4 Remove the securing screws D (x6) from the heater control panel.
Note: The size and shape of the heater control panel can vary.
5 Carefully lift the heater control panel to get access to the connectors below it.
6 Disconnect the electrical connectors G from the bottom H of their controls E and F.
7 Loosen the securing nuts J, then remove the controls E and F from the heater control panel.
The installation procedure is the reverse of the removal procedure.
More repair case for JCB machine,pls refer to:JCB Machine Trouble Repair