Looking at the only info in my Carver water heater user manual (Truma took over Carver) it could be air in the system after changing a bottle and may need several attempts to light it. It also states if leasure battery is below 10.5 volts. Very spars on info.
You could try contacting Truma they may be able to help.
Technical Help
Touring caravan and mobile home space heaters, water heaters, water filtration systems and Caravan Mover are no longer manufactured by Carver the product range having been acquired by Truma.
For specific information and spares relating to the individual products, such as space heaters, water heaters, water filtration systems and Caravan Mover please refer to Truma UK Ltd. The links below are designed for ease of use.
Contact Details:
Email
technicalATtrumauk.com
salesATtrumauk.com
ON EMAIL ADDRESS CHANGE THE AT TO NORMAL EMAIL SYMBOL AS THIS FORUM DOES NOT ACCEPT EMAIL ADDRESS IN NORMAL FORM.
Website www.trumauk.com
Telephone 01283 586050
Fax 01283 586051
Address Truma UK Ltd
Park Lane
Dove Valley Park
South Derbyshire
DE65 5BG
Bob, May 2012
