diff --git a/Thermo.Active/wwwroot/src/app_modules_thermo/setup/riscaldi/components/base-components/warmers.ts b/Thermo.Active/wwwroot/src/app_modules_thermo/setup/riscaldi/components/base-components/warmers.ts
index 3ecfcf3a..e905d44e 100644
--- a/Thermo.Active/wwwroot/src/app_modules_thermo/setup/riscaldi/components/base-components/warmers.ts
+++ b/Thermo.Active/wwwroot/src/app_modules_thermo/setup/riscaldi/components/base-components/warmers.ts
@@ -247,6 +247,9 @@ export default class Warmers extends Vue {
 
     let result = new Map<number, Warmers.IResistance[]>();
 
+    for (const c of this.channels) c.setpointHMI = 0;
+
+
     for (const row of this.rows) {
       for (const cell of this.resistancesPerRow(row)) {
         this.resistancePosition(row, cell, point1, point2, point3, point4);