Home / Troubleshooting / coding-isometric-04 Error Message – E1 – UCCG floor heating thermostat coding-isometric-04 E1= Internal error. The UCCG floor heating thermostat must be replaced. Please contact your local reseller to get a replacement. Underfloor Heating Thermostats Heated Floors Further Questions? Troubleshooting Check the Resistance Readings of your Electric Floor Heating System Once a repair has been completed, can I replace the tile right away? Error Message E2 – UCCG floor heating thermostat What is a TDR Meter and how do I use it? How to repair an electric floor heating cable system Check the Resistance Readings of your Electric Floor Heating System I nicked the wire slightly; do I need a repair kit? What can I do if my old thermostat has stopped working? Is it possible to repair damaged underfloor heating? What if my UCCG floor heating thermostat says system is on however the floor is not heating up? My GFCI keeps tripping without pressing the Test Monthly button on the UCCG floor heating thermostat Error Message – E1 – UCCG floor heating thermostat Error Message – E0 – UCCG floor heating thermostat Miscellaneous questions Can I replace tile immediately when repair is completed? Wiring I nicked the wire slightly; do I need a repair kit?