Hi.
Hi regarding the bulb and the wire, and the gas pressure problem due to the defective 'gas tap' (probaby the pressure regulator), if the gas tap is not built in with the appliance, then it is probably a part called pressure regulator, that can be purchased alone from any part seller in Fr. If the gas tap is instead the burner inside the oven call Rangemaster (see below)
If the technician saw a defective burner or pressure regulator, than that is likely the problem. We check the colour of the flame to understand if there are gas mixture or gas pressure problems. Make sure that the temperature probe inside the cavity has also been tested. It must read about 1080 Ohms when you test impedance with a multimeter.
Parts for older appliances from this manufacturer are not available in France but they may be purchased from UK Rangemaster central. They should be able to ship in France.
Here the link
Customer SupportHere different reseller distributing Rangemaster parts. Drop them an email:
Rangemaster™ Spare PartsCurrys partmaster.co.ukRegards.
Ginko