Underfloor Heating Actuator Replacement
A faulty underfloor heating actuator can leave one room cold, stuck on, or slow to respond. Actuator replacement restores reliable zone control by fitting the correct actuator on your manifold and confirming the loop opens and closes as it should.
More information
What actuator replacement covers
Actuators sit on the underfloor heating manifold and open or close each heating loop when your thermostat calls for heat. This service is designed to get individual zones working properly again.
- Fault-finding to confirm the actuator is the cause, not the thermostat, wiring centre or valve pin
- Removal of the failed actuator and fitting of the correct replacement (e.g., 230V or 24V, normally closed or normally open)
- Checks that the valve pin moves freely and the manifold loop responds correctly
- Electrical and control checks at the manifold to confirm safe, correct operation
- Functional testing of the affected zone and basic system checks to spot related issues
When this service is most useful
Actuator replacement is often the right fix if one zone is not heating while others are, or if a zone stays on even when the thermostat is off. It is also common where you can hear the actuator motor but the loop still does not open, or where an actuator shows no movement or indicator change. If you have intermittent heating in one area, an actuator can be the simplest place to start.
What happens during the visit
The engineer will identify the affected zone at the manifold, verify the actuator type and wiring, then isolate power before removing the faulty unit. The valve body and pin are checked for sticking, then the new actuator is fitted and connected. Finally, the zone is tested from the thermostat or controller to confirm it opens, heats and shuts down correctly.
After replacement: testing, balancing and ongoing value
Once the actuator is working, the system is checked to make sure heat is distributing evenly across the loop. If needed, basic adjustments can be made at the manifold to improve response and comfort. You will be advised on any follow-up work if a control fault, circulation issue or balancing problem is found during testing.