We originally had a Pentair F26/011773 1 1/2 HP motor put in in 2009 wen the pool was built. After some time we had a pool service co replace it and they installed a century 1 1/2 HP motor. It was then replaced with the same Century motor in January 2021. It started shutting down and overheating, pool service said it was not covered under warranty, that rain had gotten into it and shorted things out. That made no sense to me, but we ordered the same pump and had our electrician install it for us. It also continued to overheat and shut down. He replaced the breaker and upgraded the wires, just to ensure it was nothing electrical— no help. We have verified that the skimmer lines and main drain lines have suction. We replaced the 4 cartridge filters and the closure for the filter itself. Still overheating. The pump basket is full and appears to be working fine. The filter pressure is 25 psi when running. The electrician said the motor was pulling too many amps. Can anyone help? There are very few qualified service technicians in my area and we are at our wits end! Thanks so much!
Replaced pump motor and new one still overheating
- Thread starter amdkennedy
- Start date
-
- Tags
- pump shutting down
- May 3, 2014
- 58,382
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
Welcome to the forum!
Is the current motor the same THP as the original motor. It sounds like it is not. The impeller is most likely too big for your current motor, causing it to work too hard and overheat.
Post a picture of the label on your current motor. Also the label from the wet end.
I suggest you read ABC's of Pool Water Chemistry.
Is the current motor the same THP as the original motor. It sounds like it is not. The impeller is most likely too big for your current motor, causing it to work too hard and overheat.
Post a picture of the label on your current motor. Also the label from the wet end.
I suggest you read ABC's of Pool Water Chemistry.
This chart shows you what impeller each pump model number takes.
The below chart shows the total hp that each impeller takes.
Impeller......Total HP.
073126.........0.95
073127.........1.25
073128.........1.65
073129.........2.20
073130.........2.60
073131.........3.45
The total hp is the rated hp x the service factor.
A 1.0 hp motor with a service factor of 1.65 is the same as a 1.5 hp motor with a service factor of 1.1.
A 1.0 hp motor with a service factor of 1.65 is called a "full rated" motor.
A 1.5 hp motor with a service factor of 1.1 is called an "up-rated" motor.
They are both the exact same motor. They both have a total of 1.65 hp.
So, it's confusing to see one listed as 1 hp and the other listed as 1.5 hp.
The key is the total hp, which is what really matters.
The WF-26 model WhisperFlo takes a 073128 impeller, which requires 1.65 total hp, which is what the motor is.
So, it should be right, but the impeller might have been replaced.
So, we would need to look at the impeller to see what the part number is.
You can measure the voltage and the amps to see if they are correct.
You can check to see if the motor is set for the correct voltage.
You can try turning the shaft from the back to see if it turns freely or if it seems to be binding.
- May 3, 2007
- 16,893
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
The Pentair F26/011773 1 1/2 HP is a WF-26 which is a 1.5 HP uprated pump so a 1.65 THP motor should be sufficient assuming they never changed the impeller too.
Based on the pressure, the impeller is probably bigger than the original.
If they replaced the impeller, it should be on your invoice.
In any case, you will probably need to open it up to check it out.
You can use any of the following impellers.
Unless you need a lot of flow, I would get a 073126 or a 073127.
073126.........0.95
073127.........1.25
073128.........1.65
You should also get a good seal.
Pump Seals - Further Reading
www.troublefreepool.com
How many amps was the motor pulling?
Is the supply 115 volts or 230 volts?
Is the motor set for 115 volts or 230 volts?
electrician said 230 volts and at start up pulling 37 amps, then dropping some. I can only assume that it is set at 230V?
37 amps makes no sense. You can't go by startup current.
You need to know the steady current once the pump reaches normal operating speed.
You need to recheck it to see what the steady current is.
Does the shaft turn freely?
What impeller do you have?
You can't assume, you need to know.
It can be connected to 115 or 230 volts.
You need to know the amperage at normal operation with full prime.
You need to know what impeller you have.
Also, impeller not clogged, turns freely when using screwdriver to check it. Don’t think it was ever replaced…the multi function control for the filter is slightly leaking— not a steady drip but..Could that have any bearing?
Again, you need to know. Guessing and assuming are not going to help us solve anything.
No.