Fan

[contemporary]

I have a ford transit 2004 SWB (DUEL FUEL), the temperture gauge is fully to the right. Normally it sits half way and the hi speed fan keeps coming on. The radiator is stone cold the heating is on one minute and off the next (blowuing out cold air), the water tanked is topped up and I am driving around with the fan on after about 10 to 15mins. How can i get the heater to work properly? what do i need to do to get the fan to stop running at hi speed?

[Frag]

Could be something fairly simple as an airlock or faulty thermostat to an head gasket failure !

Take it you have aftermarket lpg,sure factory fit ones don`t have a temp guage