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I have a Grundfos MQ3-45 fresh water pump.....what do you if there is water in the control panel

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Anonymous

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Posted on Jan 02, 2017

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tberan1

  • 523 Answers

SOURCE: Grundfos UPS 25-50 180 - start up

Are you able to check for power to the pump with a mult-meter. If you have power you the know the pump has siezed (flat spot on the motor) if there is no power then you know there are issues with the controls.
I hope this may have helped,
Tom

Posted on Oct 14, 2009

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jgwhomeequip

Jeremy Reddick

  • 1902 Answers

SOURCE: I have a problem with the MQ-35 pump starting and

This sounds like a issue with air still being in the system and not being removed from the system to make things work properly. I did try to findthere number and was unable to locate it. The only other option for you is to return the product and find one with better support

Posted on May 04, 2010

FukedbyFOGLE

  • 1 Answer

SOURCE: Grundfos submersible well pump with Grundfos CU301

Grundfos is a p. o. s. I have a new system cu 301 and I have had to get it repaired twice by Fogle Pump and Supply. These guys are real rip of artists in Washington State and should be reported to the BBB. Dont Use Fogle if you need a well

Posted on Sep 30, 2010

heatman101

D. Floyd Kolb

  • 43501 Answers

SOURCE: water not drained, control panel lights on at "pan



Hi,


Here is a tip that I wrote that will help you with your dishwasher not draining problem...

Dishwasher Problems -
Water will not drain out

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Posted on Feb 24, 2011

thomas gowen

  • 92 Answers

SOURCE: Grundfos pump switches on & off continuously with

if you have a pump for the whole house you need to check the bladder tank. there is a air valve on the top. Check the pressure with a tire gauge you should have at least 20 PSI this will stop the pump from the on and off thing.

You can compress air yuo can not compress water. thats why the ballder tank. As the pump work to shut off pressure it is compressing air. then when you use a little water the pump does not run until a large about is run then the pump will re fill the system

Best of luck

R J

Posted on Sep 08, 2011

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1 Answer

Grundfos water pump MQ3-45B. Will stop after frequent use. I have to turn it off and on to reset it. Control panel?


I would first check to see if any valves are partially closed, increasing the run time of your pump and causing over heating. Next I would check for any possible obstructions to water flow.

Grundfos pumps are designed to shut down when they are at risk of overheating and burning out which requires a manual reset. This can also be caused by insufficient water in the system, so you may want to bleed out any air that may be in it.

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There are several possibilities here. All involve water pressure. The first is that you have a water leak between the pump and where the water is going to.
The second is that the pump is not getting enough water to it so it is sucking air well as water in an attempt to give you water perssure. This could be caused by not having an inline "one way" valve on your supply line just before the pump ($30.00).
The third involves two little screws on the control where your electical connection is. These two screws control the high and low pressure settings of your pump. If your high setting is too high the pump will simply keep running trying to do the impossible, If there is not enough difference between the high and low setting the pump will also keep on. running.
Another possibility is that the pump has had debris (sand, dirt, mud, etc) sucked through it and has damaged either the housing or more likely the impeller that spins the water creating the pressure.Ther is also an internal seal that can be damaged by debris.
The final possibility is that the pressure control unit with the two little screws I mentioned earlier has failed and is deffective.

Most importantly if the pump is running hot please stop using it! You are at risk of fire and possibly the loss of your home and loved ones. Grundfos pumps can be serviced by a professional technician, Parts are readily available and not extremely expensive. I would not recommend doing it youself if it is the pump.as some specialty tools may be involved depending on the problem. You will become frustrated very quickly.
A fast solution is to buy one of the cheap plastic pumps ($169.00) made in China. They are amazing for the price and will run with no problems for years if your water is free of debris. Fixing your Grundfos may run you the same amount and you maybe without a pump for a week or more depending on the technicians work load.
I am not saying "Don't fix your Grundfos" but you don't need to be in a panic about it either.

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Pressure is bleeding back through the pump or system to the tank or well or where ever the water is coming from. Should be some sort of one way valve to keep water from going back to the source, mounted somewhere so that once pressure is pumped up, it will hold that pressure in the part of the system that has the pressure switch that controls the pump.

That or you have a leak where you can't see it. (Actually you do, it is just internal and not leaking outside the pipes!)

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The next thing that I would try would be if it is possible, try to get either the motor end or the impellar end to rotate by hand, using a screwdriver or other tool. Maybe the bearings are somewhat rusted/seized together. If you can do it by hand, then it may work electrically.
Don't do anything by hand while it is powered up.
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Grundfos is a sealed unit and not a repairable item.
The timer dial should turn.
And pins located around dial control ON-OFF functions as timer dial rotates.
geno_3245_93.jpg

Does the receptacle have power?
If receptacle has power, and Grundfos is not working, then it is broken.
Grundfos manuals for UP series pumps do not show breakdown or parts list of any kind.
http://www.us.grundfos.com/web/download.nsf/Pages

Bigger question:
Why don't you have hot water?
Is water heater functioning?
Water heater is a separate appliance from Grundfos pump.
Grundfos pump circulates hot water from tank into the lines so there is no waiting for hot water ... but hot water heater should still make hot water.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Add a comment about water heater if that is also a problem.
You could have 2 problems, and water heater is main issue.

For do-it-yourself electric water heater repairs:
http://waterheatertimer.org/6DIY.html

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Grundfos is a p. o. s. I have a new system cu 301 and I have had to get it repaired twice by Fogle Pump and Supply. These guys are real rip of artists in Washington State and should be reported to the BBB. Dont Use Fogle if you need a well

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Are you able to check for power to the pump with a mult-meter. If you have power you the know the pump has siezed (flat spot on the motor) if there is no power then you know there are issues with the controls.
I hope this may have helped,
Tom

Oct 14, 2009 | Grundfos Plumbing

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