My fagor HT-50X oven is dirty. How do I clean it?

Depends where you are. I believe Fagor are a Spanish company, where are you?

disassemble door , clean glass , reassemble. door.

Hi firstly, U.K uses 110 Vdc and rest of the world or most of the other parts of the world use 220-230 Vdc, so unless your Fagor 5HA200LX Oven has a built in voltage converter from 110 Vdc to 220 Vdc, which most new appliances have these days.
Try these shops:
http://www.fagoramerica.com/shop2/replacement_parts/halogen_oven#
http://www.guaranteedparts.com/category/FAGOR.html

Fagor appear to be a poor quality brand of oven. I also cannot get the timer to turn on the oven. I am going to find out how to bypass it as I dont want to wasre more money on such bad quality machinery. T P Kennedy

But the question was about F02, not F07. What is F02 error about?

I cleaned the smoke filter, took of the top cover, in front of electronics is the brown smoke sensor. I took of one wire off the sensor, started the oven (beware of not shortcutting anything) the f06 error message had disappeared. I put back the wire, mounted the top cover and the oven functions like new.

Buy a new oven, other brands not Fagor.

From the symptoms you describe, I would say the oven thermostat is faulty, and in need of replacement.
This is the control you regulate the temoperature with.
Hope this helps.

I had a similar problem - turned out the knob on the left by the clock was set to automatic instead of manual.