Dorothy, Just done a quick bit of Googling and, although my possible source seems to have folded (web-site unavailable), I found these that seem to stock a range of spares for 400s: http://www.leisureshopdirect.com/caravan/caravan_accessories/Dometic- Electrolux_Spares$$1.aspx
Might be worth a try once you've identified the problem. One further question that I should have posed in my previous reply: Does the flame light but only for as long as you're pressing the gas supply knob? If the flame goes out as soon as you release the knob then it's likely that you need a new thermocouple. Roger
