If this pan becomes clogged with debris mold or even algae it could overflow and create a puddle around your pump.
Heat pump water heater condensate drain.
I d call tech support and scour the internet there s probably a sensor that s gone bad.
Heat traps on inlet and outlet are properly installed.
No problems so far i just run my condensate line to a condensate pump which then pumps the water to a drain in my basement.
Power vent and power direct vent heaters are equipped with the condensate drain so the water vapor from the exhaust gases will roll down the pvc vent pipe and through the drain port out.
I have a hp water heater as well.
Not sure how they determine that your line is plugged whether it s pressure or some other means.
Most heat pumps have a drain pan which is used to collect condensation from the unit.
The recommendation is to get a condensate drain kit for convenient draining and metal drain pans to protect the room where the heater is installed.
The state hybrid manual says to put water heater in standby mode then turn off power remove access panel on fan side by loosening screws wipe dirt and debris to clean pan inspect line for clogs and kinks do not reduce drain tube into smaller line put cover back and restore power then system performs diagnostic prior to operation.
Little giant condensate pump.
Condensate drain lines are properly installed and piped to an adequate drain or condensate pump installed.