We have the Splendide Combo Washer/Dryer so what I do is feed the pink stuff in using the hose and turn the WD on and turn the hot/cold selection on as it's filling so both the pipes and hot and cold valves get the pink stuff,
For others with the Splendide, depending on your model and if you used the rinse cycle for winterizing (Selector A, I think) you may have not cycled the hot water solenoid by switching the temp selector to hot. My Splendide washer unit ARXL129, requires I use Perma Press Selector (Number 3, I think) and run it with winterizing fluid through the inlet lines until the drum turns. This cycles all 3 solenoids (2 cold, one for rinse fill, one for cold water fill for wash, and 1 hot water fill for wash).
Mine is a stackable unit, this may not apply to the Combo unit.
You should be able to look behind the washer and see if water has been displaced by pink antifreeze in the clear elbows in the hoses before they attach to your machine (if you have similar hoses to my OEM installed W/D). Here is what mine looked like with just the cold displaced and the hot not displaced. Both should be pink.