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.
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.
GC-EMERAnyone, contract or not
Within four hours, any hour, all year
Leak or burst
Isolate first, repair second. Includes tracing a leak under a floor with cameras rather than lifting the whole room.
GC-LEAKAnyone
Within two hours for anything actively running
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.
GC-SERVAll plans
Booked within ten working days
Landlord safety check
Gas safety record for up to three appliances, tenants given notice by the office, certificate emailed the same evening.
GC-GSCLandlord contract or one-off
Booked within a week, earlier if a certificate is expiring
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.
GC-INSTQuoted per property
Survey inside three days; fitting usually within a fortnight
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.
GC-POWERAll plans
Booked within two weeks, one full day on site