diff --git a/zhaquirks/schneiderelectric/thermostat.py b/zhaquirks/schneiderelectric/thermostat.py
index 6a40a0b787..e12541e1a4 100644
--- a/zhaquirks/schneiderelectric/thermostat.py
+++ b/zhaquirks/schneiderelectric/thermostat.py
@@ -643,7 +643,7 @@ class AttributeDefs(CustomCluster.AttributeDefs):
         device_class=NumberDeviceClass.TEMPERATURE,
         unit=UnitOfTemperature.CELSIUS,
         min_value=0,
-        max_value=12,
+        max_value=1.2,
         multiplier=0.1,
         step=0.1,
     )
@@ -691,7 +691,7 @@ class AttributeDefs(CustomCluster.AttributeDefs):
         fallback_name="Boost amount",
         device_class=NumberDeviceClass.TEMPERATURE,
         unit=UnitOfTemperature.CELSIUS,
-        min_value=0,
+        min_value=0.5,
         max_value=10,
         multiplier=0.01,
         step=0.5,