diff --git a/nibe/connection/__init__.py b/nibe/connection/__init__.py
index 54210ec..cd4e2c3 100644
--- a/nibe/connection/__init__.py
+++ b/nibe/connection/__init__.py
@@ -2,9 +2,10 @@
 
 from abc import ABC, abstractmethod
 from collections.abc import AsyncIterator, Iterable
+from contextlib import suppress
 
 from nibe.coil import Coil, CoilData
-from nibe.exceptions import ReadException, ReadExceptionGroup
+from nibe.exceptions import ReadException, ReadExceptionGroup, WriteDeniedException
 from nibe.heatpump import HeatPump, ProductInfo, Series
 
 DEFAULT_TIMEOUT: float = 5
@@ -82,6 +83,10 @@ async def verify_connectivity_read_write_alarm(
 
     To verify connection, we read the alarm reset field and write it as 0
     this will be ignored by the pump, this will throw exceptions on failure.
+
+    We ignore if the write was denied since that is still indicative of a
+    working connection. F-series pumps that is MyUplink upgraded seem to
+    reject these writes.
     """
     if heatpump.series == Series.S:
         coil = heatpump.get_coil_by_name("reset-alarm-40023")
@@ -93,4 +98,6 @@ async def verify_connectivity_read_write_alarm(
     if coil.mappings:
         value = coil.mappings[str(value)]
     coil_data.value = value
-    await connection.write_coil(coil_data)
+
+    with suppress(WriteDeniedException):
+        await connection.write_coil(coil_data)
diff --git a/nibe/connection/modbus.py b/nibe/connection/modbus.py
index 89ed9c4..329a5be 100644
--- a/nibe/connection/modbus.py
+++ b/nibe/connection/modbus.py
@@ -16,6 +16,7 @@
     ReadIOException,
     ReadTimeoutException,
     ValidationError,
+    WriteDeniedException,
     WriteIOException,
     WriteTimeoutException,
 )
@@ -153,7 +154,7 @@ async def write_coil(
                     raise ReadIOException(f"Unsupported entity type {entity_type}")
 
             if not result:
-                raise WriteIOException(f"Heatpump denied writing {coil.name}")
+                raise WriteDeniedException(f"Heatpump denied writing {coil.name}")
             else:
                 logger.info(f"Write succeeded for {coil.name}")
         except ValidationError as exc:
diff --git a/nibe/connection/nibegw.py b/nibe/connection/nibegw.py
index f360520..abc4c96 100644
--- a/nibe/connection/nibegw.py
+++ b/nibe/connection/nibegw.py
@@ -65,7 +65,7 @@
     ReadIOException,
     ReadSendException,
     ReadTimeoutException,
-    WriteException,
+    WriteDeniedException,
     WriteIOException,
     WriteTimeoutException,
 )
@@ -369,7 +369,7 @@ async def write_coil(
                 result = self._futures["write"].result()
 
                 if not result:
-                    raise WriteException(f"Heatpump denied writing {coil.name}")
+                    raise WriteDeniedException(f"Heatpump denied writing {coil.name}")
                 else:
                     logger.info(f"Write succeeded for {coil.name}")
             except asyncio.TimeoutError:
diff --git a/nibe/exceptions.py b/nibe/exceptions.py
index e915b23..b956ce9 100644
--- a/nibe/exceptions.py
+++ b/nibe/exceptions.py
@@ -33,6 +33,10 @@ class WriteException(NibeException):
     pass
 
 
+class WriteDeniedException(WriteException):
+    """Raised a write of a value was rejected by the pump."""
+
+
 class WriteIOException(WriteException):
     """Use this and child exceptions if IO has failed and you want to retry."""