You shouldn't need to press the switch, it should change automatically. When you first start the car, it will have one LED flashing on the switch steadily. Once up to temperature, it should change colour and become steady.
Somewhere i've got information on an LPGTech system, i'll try and find it.
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Cheers
Dave
Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........
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