diff --git a/homeassistant/components/ccm15/climate.py b/homeassistant/components/ccm15/climate.py
index b4038fbbf43..a6e5d2cab61 100644
--- a/homeassistant/components/ccm15/climate.py
+++ b/homeassistant/components/ccm15/climate.py
@@ -57,6 +57,7 @@ class CCM15Climate(CoordinatorEntity[CCM15Coordinator], ClimateEntity):
         HVACMode.HEAT,
         HVACMode.COOL,
         HVACMode.DRY,
+        HVACMode.FAN_ONLY,
         HVACMode.AUTO,
     ]
     _attr_fan_modes = [FAN_AUTO, FAN_LOW, FAN_MEDIUM, FAN_HIGH]
diff --git a/tests/components/ccm15/snapshots/test_climate.ambr b/tests/components/ccm15/snapshots/test_climate.ambr
index 10423919187..27dcbcb3405 100644
--- a/tests/components/ccm15/snapshots/test_climate.ambr
+++ b/tests/components/ccm15/snapshots/test_climate.ambr
@@ -16,6 +16,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -70,6 +71,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -125,6 +127,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -164,6 +167,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -202,6 +206,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -256,6 +261,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -308,6 +314,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,
@@ -342,6 +349,7 @@
         <HVACMode.HEAT: 'heat'>,
         <HVACMode.COOL: 'cool'>,
         <HVACMode.DRY: 'dry'>,
+        <HVACMode.FAN_ONLY: 'fan_only'>,
         <HVACMode.AUTO: 'auto'>,
       ]),
       'max_temp': 35,