diff --git a/tests/fixtures/golden/airconditioner_tp1x_da_ac_rac_01011.json b/tests/fixtures/golden/airconditioner_tp1x_da_ac_rac_01011.json
index e640332..b9643bf 100644
--- a/tests/fixtures/golden/airconditioner_tp1x_da_ac_rac_01011.json
+++ b/tests/fixtures/golden/airconditioner_tp1x_da_ac_rac_01011.json
@@ -9,6 +9,10 @@
     "display_light",
     "energy_kwh",
     "energy_saved_kwh",
-    "firmware_update"
+    "firmware_update",
+    "mute_once",
+    "selfcheck_error",
+    "selfcheck_result",
+    "selfcheck_status"
   ]
-}
\ No newline at end of file
+}
diff --git a/tests/test_climate_temperature_fallback.py b/tests/test_climate_temperature_fallback.py
new file mode 100644
index 0000000..41fb3ca
--- /dev/null
+++ b/tests/test_climate_temperature_fallback.py
@@ -0,0 +1,38 @@
+"""Tests for the /temperatures/vs/0 fallback helper in climate.py (PR #36).
+
+`_temps_vs_item` is a pure module-level function (plain dict in, plain dict
+out) with no coordinator/entity dependency, so -- like select.py's `_display`
+in test_select_display.py -- it's testable directly even though the
+LocalThingsClimate entity itself needs a coordinator/hass fixture to
+exercise. This covers the actual fallback-selection logic that the
+registry-level "no unbound hrefs" tests in test_airconditioner_capabilities.py
+don't reach: TP1X-class firmware has no OCF-standard
+/temperature/current+desired pair, so current_temperature/target_temperature
+would silently be None without this fallback.
+"""
+from custom_components.localthings.climate import _temps_vs_item
+
+
+def test_temps_vs_item_returns_first_item():
+    rep = {
+        'x.com.samsung.da.items': [
+            {'x.com.samsung.da.current': '17.0', 'x.com.samsung.da.desired': '25.0'},
+        ],
+    }
+    assert _temps_vs_item(rep) == {
+        'x.com.samsung.da.current': '17.0', 'x.com.samsung.da.desired': '25.0',
+    }
+
+
+def test_temps_vs_item_empty_when_items_missing():
+    """OCF-pair devices don't populate /temperatures/vs/0's items at all --
+    callers must fall through to the OCF hrefs cleanly, not raise."""
+    assert _temps_vs_item({}) == {}
+
+
+def test_temps_vs_item_empty_when_items_is_empty_list():
+    assert _temps_vs_item({'x.com.samsung.da.items': []}) == {}
+
+
+def test_temps_vs_item_empty_when_items_entry_is_not_a_dict():
+    assert _temps_vs_item({'x.com.samsung.da.items': ['not-a-dict']}) == {}