Heating & radiators

Bleed, balance, TRVs, radiator jobs, boiler pressure info, and Gas Safe boundaries.

4 guides

How to Replace a TRV

Swap a stuck or leaking thermostatic radiator valve on a UK radiator. Isolate or drain the rad, fit the new body and head, and reseal tails with PTFE if needed.

6 August 2026Joe HartleyIntermediate

heatingradiatorsbeginner

How to Bleed a Radiator

Release trapped air from a UK radiator with a bleed key so the top heats evenly again. Check combi pressure afterwards, and call Gas Safe for boiler faults.

1 August 2026Joe HartleyBeginner

heatingradiatorsintermediate

How to Fix a Cold Radiator

Warm up a UK radiator that stays cold while others heat. Work through air, sticky TRV pins, and lockshield balance before you blame the boiler.

24 July 2026Joe HartleyIntermediate

heatingradiatorslockshield

How to Replace a Lockshield Valve

Replace a leaking or seized radiator lockshield on a UK central heating system. Count the open turns before removal so you can restore balance after the swap.

22 July 2026Joe HartleyIntermediate