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Grundfos Pump Housing Temperatuire
J Van Lund Member Posts: 19
The outside housing temperature on a 12-year old Grundfos UP15-42has a temperature increase of 10 to15F over the circulating water temperature inside the circuits. Water temp 110F; outside pump temp 125F. Is this a cause for concern or replacement?
I believe they rate their motors for a given temperature above ambient, not the circulating water temperature. Its usually listed on the motor.
Only way to know for sure if you are in trouble is to check the motor amperage. And even that isn't much help, because some of these little motors draw the same amperage with a locked rotor as they do under normal full load.
MEIt's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.0
What Mark said - check the amp draw. The pump is rated for water temps in excess of 200*F.Steve Minnich0
Are you sure it is circulating, not air locked. if the temperature continues to increase it may be air locked
The motor will add some heat it is a 42W motor, some is pumping energy, some heat.Bob "hot rod" Rohr
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