Electrics and gas
Where a report pairs a column radiator with a seized lockshield, what stays open about balancing nobody carried out?
What stays open is the effect of a seized lockshield, because nobody balanced the system. A column radiator paired with a valve that will not turn means that radiator cannot be adjusted from that valve. Balancing is the job of setting flows so each radiator gets its share, and the survey did not do it. The visit saw the radiator and the seized valve. It has not decided that other rooms are starved, and it has not decided that freeing this one valve would cure the heating. The balance of the circuit remains unknown.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
A lockshield is the valve used to set a radiator rather than to switch it daily. When it has seized, that setting is stuck. On a column radiator the valve may be old and corroded, which explains the stiffness, but stiffness does not show how much water is actually flowing. The surveyor can fail to turn the spindle. They cannot see whether the rest of the circuit is already in balance, because nobody carried out that exercise. The seized valve is a fact. The heating result is not.
Ask a heating engineer to free or replace the lockshield and then balance the circuit if the system is to be kept. The survey has not specified those parts and has not run that balance. Tell the solicitor the valve was seized and that no balancing was done, so a cold room elsewhere is not yet explained. If the boiler is gas, the appliance check belongs with a Gas Safe registered engineer. Do not treat one stuck valve as a verdict on the whole heating.
What should you ask your surveyor?
- Did the lockshield refuse to move, or was the cap only painted over?
- Were other radiators checked for heat once this valve would not turn?
- Is the column radiator on the same circuit as radiators that did get warm?
What are the typical next steps?
- Keep the seized lockshield separate from a balance that was not done.
- Ask a heating engineer to free the valve and balance only after that.
- Tell the solicitor other radiators were not proved starved.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
Can a column radiator be balanced with the wheel valve instead?
The wheel valve is the one you turn day to day. It is a poor substitute for a lockshield, which is the valve meant to set the flow. The survey found the lockshield seized and did not carry out any balancing. It has not decided another valve can do that job. An engineer needs to deal with the seized valve first.
Does a seized valve mean the radiator is blocked solid?
Not necessarily. A seized lockshield can be a stuck spindle while the bore is still open, or it can be corrosion that has closed the way. The survey did not open the valve and did not balance the system. It has not decided the column radiator is blocked. The inside of the valve stays unknown.