L
Linda ClarkSep 7, 2025
What does it mean if YELLOW and RED diode light up but radiator still cool on my TERMA Heating System?
- AAlexander SteeleSep 7, 2025
If the YELLOW and RED diodes light up on your TERMA Heating System, but the radiator remains cool, it indicates that the thermal fuse or electronics may be damaged. Contact the distributor for assistance.






