Fix error on empty UOM for ISY994 Climate Device (#36454)

homeassistant/components/isy994/climate.py

@@ -133,7 +133,7 @@ class ISYThermostatEntity(ISYNodeEntity, ClimateEntity):
         # Which state values used depends on the mode property's UOM:
         uom = hvac_mode.uom
         # Handle special case for ISYv4 Firmware:
-        if uom == UOM_ISYV4_NONE:
+        if uom in (UOM_ISYV4_NONE, ""):
             uom = (
                 UOM_HVAC_MODE_INSTEON
                 if self._node.protocol == PROTO_INSTEON

homeassistant/components/isy994/cover.py

@@ -83,8 +83,8 @@ class ISYCoverEntity(ISYNodeEntity, CoverEntity):
 
     def set_cover_position(self, **kwargs):
         """Move the cover to a specific position."""
-        position = kwargs.get(ATTR_POSITION)
-        if position and self._node.uom == UOM_8_BIT_RANGE:
+        position = kwargs[ATTR_POSITION]
+        if self._node.uom == UOM_8_BIT_RANGE:
             position = int(position * 255 / 100)
         if not self._node.turn_on(val=position):
             _LOGGER.error("Unable to set cover position")