Radiator with Eurotronic smart TRV does not heat up at all, while other radiators work normally.

Safety: Radiators can be hot; allow them to cool. Do not loosen water-carrying fittings unless you are qualified.

• Check TRV display: Ensure the TRV is powered, paired, and not in frost protection or off mode.
• Remove TRV head: Unscrew the TRV head and check if the radiator heats up with the head removed (valve pin fully open). If it does, the TRV is not opening enough.
• Free valve pin: Gently press and release the valve pin until it moves freely.
• Verify adapter: Confirm that the correct Eurotronic adapter is used and that the TRV head sits straight and tight on the valve.
• Bleed radiator: If the valve opens but radiator remains cold, bleed air from the radiator using a bleed key (heating off, then on) or contact a heating technician.
• Replace TRV head: If the valve and radiator are fine but the TRV does not open fully, replace the TRV head.