You could start with a college course like Level 2 Diploma in Plumbing and Heating. This would teach you some of the skills needed for the job and could help when you apply for a trainee position with a company.
To fully qualify as a gas service technician, you'll need a recognised gas industry qualification like:
- Level 3 Domestic Natural Gas Installation
- Level 3 Diploma in Gas Utilisation Installation and Maintenance
You would usually need to be working to complete the level 3 qualification.
You should choose a course that includes work placements, or try to find a job with a gas servicing firm soon after starting your course.
You'll usually need:
- 2 or more GCSEs at grades 9 to 3 (A* to D) for a level 2 course
- 4 or 5 GCSEs at grades 9 to 4 (A* to C) for a level 3 course