The jobs the control room books, and what each one runs to

Six call-out types with what they cover, who they are open to and how quickly a van can realistically be there. The assistant works from this list instead of guessing at a job.

Code	What it is	What it covers	Plan	Turnaround
`GC-EMER`	No heat, no hot water	The call that gets priority: an engineer diagnoses on site, fixes it the same visit where the part is on the van, and tells you the figure before touching anything.	Anyone, contract or not	Within four hours, any hour, all year
`GC-LEAK`	Leak or burst	Isolate first, repair second. Includes tracing a leak under a floor with cameras rather than lifting the whole room.	Anyone	Within two hours for anything actively running
`GC-SERV`	Annual service	The proper hour-long one: combustion tested, seals checked, condensate cleared, and a written report you can hand a landlord or a buyer.	All plans	Booked within ten working days
`GC-GSC`	Landlord safety check	Gas safety record for up to three appliances, tenants given notice by the office, certificate emailed the same evening.	Landlord contract or one-off	Booked within a week, earlier if a certificate is expiring
`GC-INST`	Boiler replacement	Survey, a fixed quote that includes the bits other firms leave off, and two days on site with the old unit taken away.	Quoted per property	Survey inside three days; fitting usually within a fortnight
`GC-POWER`	System flush	For radiators cold at the bottom and a boiler short-cycling itself to death: a full flush, inhibitor, and a magnetic filter fitted while the system is open.	All plans	Booked within two weeks, one full day on site

The assistant reads this same table through its list_services tool, so what it tells you and what this page says cannot drift apart.