diff --git a/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/ApiPageParser.java b/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/ApiPageParser.java
index c6d9a7a1512..cd5c955a81f 100644
--- a/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/ApiPageParser.java
+++ b/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/ApiPageParser.java
@@ -342,7 +342,8 @@ public class ApiPageParser extends AbstractSimpleMarkupHandler {
                                 channelType = "Number:Temperature";
                                 state = new QuantityType<>(bd, SIUnits.CELSIUS);
                             } else if ("%".equals(valParts[1])) {
-                                channelType = "Number:Percent";
+                                // channelType = "Number:Percent"; Number:Percent is currently not handled...
+                                channelType = "Number:Dimensionless";
                                 state = new QuantityType<>(bd, SmartHomeUnits.PERCENT);
                             } else if ("Imp".equals(valParts[1])) {
                                 // impulses - no idea how to map this to something useful here?
diff --git a/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/TACmiSchemaHandler.java b/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/TACmiSchemaHandler.java
index 2288a3b1add..9070cc1a83f 100644
--- a/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/TACmiSchemaHandler.java
+++ b/bundles/org.openhab.binding.tacmi/src/main/java/org/openhab/binding/tacmi/internal/schema/TACmiSchemaHandler.java
@@ -250,6 +250,17 @@ public class TACmiSchemaHandler extends BaseThingHandler {
                     return;
                 }
                 break;
+            case NUMERIC_FORM:
+                ChangerX2Entry cx2en = e.changerX2Entry;
+                if (cx2en != null) {
+                    reqUpdate = prepareRequest(buildUri("INCLUDE/change.cgi?changeadrx2=" + cx2en.address
+                            + "&changetox2=" + command.format("%.2f")));
+                    reqUpdate.header(HttpHeader.REFERER, this.serverBase + "schema.html"); // required...
+                } else {
+                    logger.debug("Got command for uninitalized channel {}: {}", channelUID, command);
+                    return;
+                }
+                break;
             case READ_ONLY_NUMERIC:
             case READ_ONLY_STATE:
             case READ_ONLY_SWITCH: