Engine coolant temperature sensor 1/Engine coolant temperature sensor 2
| Engine coolant temperature sensor 1/Engine coolant temperature sensor 2 | 
| To remove | 
| 1. | Remove the cover over the combustion chamber.   | |
| 2. | Undo the screw securing the metal strip and the two detectors.   | |
| 3. | Extract engine coolant temperature sensors 1 and 2. | |
| 4. | Remove the cover over the combustion air fan.   
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| 5. | Remove the four control module bolts. | |
| 6. | Carefully extract the control module, unplug the connector and remove the control module from the heater.   | |
| 7. | Remove the centre housing.   | |
| 8. | Open connector B2 and extract the leads for engine coolant temperature sensor 1. Use tool 85 80 110.   | |
| To fit | 
 
    
    | 1. | Change engine coolant temperature sensors 1 and 2. Fit the leads in connector B2. 
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| 2. | Fit the centre housing.   | |
| 3. | Plug connector B2 into the control module.   | |
| 4. | Fit the control module.   | |
| 5. | Fit the cover over the combustion air fan. 
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| 6. | Fit engine coolant temperature sensors 1 and 2.   | |
| 7. | Fit the screw and metal strip holding the detectors in place. | |
| 8. | Fit the cover over the combustion chamber.   | |

 
		