Vaillant ecoFIT pure Installation And Maintenance Instructions Manual page 22

10 Troubleshooting
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4. Remove the temperature sensor (3).
5. Remove the upper clip (1).
6. Remove the lower clip (4).
7. Remove the supply pipe (2).
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8. Remove the upper clip (1).
9. Remove the lower clip (3).
10. Remove the return pipe (2).
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11. Remove the clip underneath the condensate tray (1).
12. Undo the four screws (2).
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13. Remove the ignition electrode (1).
14. Lift the heat exchanger up slightly and remove it to-
gether with the condensate tray.
15. Remove the ignition transformer (2).
16. Install the new heat exchanger in reverse order.
10.5.4 Replacing the pump head
1. Disconnect the pump cable from the electronics box.
2. Undo the four bolts (1).
3. Remove the pump head (2).
4. Replace the O-ring.
5. Use four screws to secure the new pump head.
6. Connect the pump cable to the electronics box.
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10.5.5 Replacing the expansion vessel
1. Drain the product. (→ Page 27)
Installation and maintenance instructions ecoFIT pure 0020230533_01
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