Omer104 Posted January 22, 2023 Share Posted January 22, 2023 Hi everyone my elderly father room underfloor heating doesn’t work properly. It’s a prowarm unit - the thermostat is working. i have noticed snowflake icon in the bottom right which wasn’t there before. does anyone have any suggestions? I have gone to the prowarm website but I couldn’t get much from there. Thanks for your help, Omer Link to comment Share on other sites More sharing options...
ProDave Posted January 22, 2023 Share Posted January 22, 2023 Do you have the instruction manual? I presume the odd characters it is displaying is some form of fault code? It does not makes sense otherwise. you need to determine if it is the heating mat that has failed (bad) or the controller (relatively easy to replace) Do you have any electrical skills or know an electrician? Link to comment Share on other sites More sharing options...
Nickfromwales Posted January 22, 2023 Share Posted January 22, 2023 Looks like it’s supposed to read “Err” aka error to me. As @ProDave says, if you can remove the controller and connect to the wires that feed the heating mat / wire to a bit of wire with a 13a plug, you can fire this up directly for 30-45mins to see if the floor heats up. No longer as it’ll be missing thermostatic control!! Please feed it with an RCD earth protected lead to keep this process safe. Do you have an RCD in the fuse board? If so, we can rule out an earth fault with the heating mat / wire. Link to comment Share on other sites More sharing options...
Nickfromwales Posted January 22, 2023 Share Posted January 22, 2023 https://www.vpsunderfloorheating.co.uk/product/prowarm-pro-digital-remote-silver/ 1 Link to comment Share on other sites More sharing options...
Omer104 Posted January 22, 2023 Author Share Posted January 22, 2023 Thank you so much for your quick responses. i don’t have electric experience unfortunately. I need to find the manual it was put in years ago. i asked an electrician and he advised £80 to check if the circuits were working without lifting the floor. If it’s not working he says need heating floor. If it is working he says it’s the unit connect the floor and thermostat but it feels that’s a lot to just rule out one problem. i have emailed prowarm too. Link to comment Share on other sites More sharing options...
Omer104 Posted January 22, 2023 Author Share Posted January 22, 2023 That’s it Nick!! Link to comment Share on other sites More sharing options...
Omer104 Posted January 22, 2023 Author Share Posted January 22, 2023 I have found the snowflake is frost protection activated. Link to comment Share on other sites More sharing options...
ProDave Posted January 22, 2023 Share Posted January 22, 2023 You need a more local electrician. The key is find one local to you, or who can call in on the way to or from another job. It will take about 10 minutes with his tester to work out if it is the controller or the heating mat at fault. Link to comment Share on other sites More sharing options...
Nickfromwales Posted January 22, 2023 Share Posted January 22, 2023 5 hours ago, ProDave said: You need a more local electrician. The key is find one local to you, or who can call in on the way to or from another job. It will take about 10 minutes with his tester to work out if it is the controller or the heating mat at fault. Is any electrician going to charge less than£80 for a callout? I know I would be more than that if I was called out to a property to give an hour of my day ( thus deleting a full working shift from my diary ). 5 hours ago, Omer104 said: i have emailed prowarm too. Lets wait to see what they say? Let us know. Link to comment Share on other sites More sharing options...
Andehh Posted January 23, 2023 Share Posted January 23, 2023 For a £80 call out fee, I'd do down that route. That's not an unreasonable fee by a long shot. Link to comment Share on other sites More sharing options...
Radian Posted January 23, 2023 Share Posted January 23, 2023 Looks like the external sensor on pins 5 & 6 has failed, shorted or become disconnected. From the manual: Quote If the floor sensor is short-circuit or broken, the LCD will display “ERR” and the thermostat will cut off output. 2 Link to comment Share on other sites More sharing options...
Omer104 Posted February 3, 2023 Author Share Posted February 3, 2023 Apologies i have not been well. Thank you for the recommendations, I will speak to a local electrician. Radian thank you for that spot thats so helpful! Link to comment Share on other sites More sharing options...
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