diff --git a/src/devices/boiler.cpp b/src/devices/boiler.cpp
index 30da339f8..028d84d17 100644
--- a/src/devices/boiler.cpp
+++ b/src/devices/boiler.cpp
@@ -590,7 +590,7 @@ Boiler::Boiler(uint8_t device_type, int8_t device_id, uint8_t product_id, const
                               FL_(tempDiffHeat),
                               DeviceValueUOM::K,
                               MAKE_CF_CB(set_tempDiffHeat),
-                              3,
+                              2,
                               10);
         register_device_value(DeviceValueTAG::TAG_DEVICE_DATA,
                               &tempDiffCool_,
@@ -599,7 +599,7 @@ Boiler::Boiler(uint8_t device_type, int8_t device_id, uint8_t product_id, const
                               FL_(tempDiffCool),
                               DeviceValueUOM::K,
                               MAKE_CF_CB(set_tempDiffCool),
-                              3,
+                              2,
                               10);
         register_device_value(DeviceValueTAG::TAG_DEVICE_DATA, &vp_cooling_, DeviceValueType::BOOL, FL_(vp_cooling), DeviceValueUOM::NONE, MAKE_CF_CB(set_vp_cooling));
         register_device_value(DeviceValueTAG::TAG_DEVICE_DATA, &heatCable_, DeviceValueType::BOOL, FL_(heatCable), DeviceValueUOM::NONE, MAKE_CF_CB(set_heatCable));
diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index 97b9086aa..5f6bae89b 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -4196,7 +4196,7 @@ void Thermostat::register_device_values_hc(std::shared_ptr<Thermostat::HeatingCi
         register_device_value(tag, &hc->cooling, DeviceValueType::BOOL, FL_(hpcooling), DeviceValueUOM::NONE, MAKE_CF_CB(set_cooling));
 
         register_device_value(tag, &hc->hpmode, DeviceValueType::ENUM, FL_(enum_hpmode), FL_(hpmode), DeviceValueUOM::NONE, MAKE_CF_CB(set_hpmode));
-        register_device_value(tag, &hc->dewoffset, DeviceValueType::UINT, FL_(dewoffset), DeviceValueUOM::K, MAKE_CF_CB(set_dewoffset));
+        register_device_value(tag, &hc->dewoffset, DeviceValueType::UINT, FL_(dewoffset), DeviceValueUOM::K, MAKE_CF_CB(set_dewoffset), 2, 10);
         register_device_value(tag, &hc->roomtempdiff, DeviceValueType::UINT, FL_(roomtempdiff), DeviceValueUOM::K, MAKE_CF_CB(set_roomtempdiff));
         register_device_value(tag, &hc->hpminflowtemp, DeviceValueType::UINT, FL_(hpminflowtemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_hpminflowtemp));