diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index 1e718c2a7..8f721427a 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -4794,7 +4794,15 @@ void Thermostat::register_device_values_hc(std::shared_ptr<Thermostat::HeatingCi
                               -1,
                               101);
         register_device_value(tag, &hc->targetflowtemp, DeviceValueType::UINT8, FL_(targetflowtemp), DeviceValueUOM::DEGREES);
-        register_device_value(tag, &hc->summertemp, DeviceValueType::UINT8, FL_(summertemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_summertemp), 9, 25);
+        register_device_value(tag,
+                              &hc->summertemp,
+                              DeviceValueType::UINT8,
+                              DeviceValueNumOp::DV_NUMOP_DIV2,
+                              FL_(summertemp),
+                              DeviceValueUOM::DEGREES,
+                              MAKE_CF_CB(set_summertemp),
+                              9,
+                              25);
         register_device_value(tag, &hc->roomsensor, DeviceValueType::ENUM, FL_(enum_roomsensor), FL_(roomsensor), DeviceValueUOM::NONE, MAKE_CF_CB(set_roomsensor));
         register_device_value(tag, &hc->holidaymode, DeviceValueType::ENUM, FL_(enum_mode4), FL_(holidaymode), DeviceValueUOM::NONE, MAKE_CF_CB(set_holidaymode));
         register_device_value(tag,
diff --git a/src/version.h b/src/version.h
index 6e46b71dc..b8067488c 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "3.7.0-dev.38"
+#define EMSESP_APP_VERSION "3.7.0-dev.39"