To pump up, or not to pump up?

RoBoTeq

You have just made my case for me Josh. I know better then to attempt to teach you anything when you are in this mode, so I'll just say; "good luck to you."

RoBoTeq

You admit the heat pumps ice up. Do heat pumps also go into defrost when they are iced up? If so, does water from melted ice run down to the bottom of the heat pump? Can that water refreeze around the bottom row of copper coil when the heat pump is operational?

If ice can form, you need to provide a way for the melted ice to drain off and away from the bottom of the heat pump. This is physics, not opinion.

ironpit

I have been on three calls this year where the units defrost failed to cut out the fan, causing the meltdown to refreeze into solid, clear ice before being able to drain out of the unit. That wasn't christmas tinsel at the bottom two rows, it was two rows of crushed coils. I have never before heard anyone deny that crushed coils happen. Around here, pump-ups are used for heat pumps, and the good companies use the miniture ones for a/c in case of freezing winter rains. As for thinking that pump-ups are for ventilation or airflow, it might be so, but that ice cold air being pulled through the bottom of the units refeeze the meltdown real fast, in these cases , before it can drain. I have seen many a/c units sitting on the ground in blocks of ice. Some, not all, have the tinseled coils. They leak dye quite well at times.

ironpit

the rubber pads on the new base are adjustable center to outside. this is a very good product

RoBoTeq

I agree. And even if the heat pump pad does stick out past the base of the smaller heat pumps, it doesn't look that bad.