baxi solo 2 50pf problem

[mickmassy]

I have a baxi solo 2 50pf gas boiler, im just going to tile the floor in my kitchen so i removed the gas cooker, i turned off the gas at the ECV and at the lever valve at the boiler pulled out the cooker and disconnected the flexi hose via the bayonet and pulled out the cooker, as the floor is not tiled yet i wanted to turn on the heating i then realised the bayonet locks itself off when disconnected so i turned back on the ECV and lever valve at boiler turned on the boiler and now she wont fire the boiler light comes on and the fan light but notting else happens. Any ideas? what did i do wrong

 

[mickmassy]

To anyone who is interested the boiler did not need purging, the boiler had not being turned on in 3 weeks and i had a RGI around to service it today and he said the pressure switch was salty and would need changing in the near future and that was the prob but he got it going for now so its ok for the moment. Has anyone heard of this fault and is this common?