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Pool Pump Causes and Solutions for Overheating Motor

Pool Pump Overheats

Like every living thing on the planet, nonliving things have a lifespan too. In this article, I will tell you about the pump, just because I love swimming every day and I do not have time to clean the pool every day.

This machine does a perfect job and helps us to maintain our swimming pools. It has a cycle: Water is first drawn in from the pools outlets sent to the front of the it. It then flows through the hair/lint trap, then the pumping chamber and pushes out through the top of the pool pump and sent to the filter. The filter then sends the water back to the pull. Pool pumps run on electricity, hence they use a lot of power and emit a large amount of heat. This process is common for any electrical equipment.

Don’t forget the fact that we usually install it in the open area. It gets direct sunlight. Again overheating can occur, whilst standing under the sun, especially during a hot summer. Thanks to the constant improvement in technology, we don’t have to pay constant attention to these machines. The new electrical machines come with a thermal disconnect. They are designed to cut the power automatically if the pump gets overheated. However, these designs sometimes have flaws – what if the power is not cut?? Well, keep reading to know more.

Is It Too Hot or Just Hot?

The pool pump like any electric motor become hot. You might want to know how much too hot is for a pool pump? Let’s test it first. Are you able to touch the motor? You can test it by placing your hand on the motor for a few seconds without getting burned. If the answer is yes,,go ahead and sigh in relief. If you can’t then indeed it is too hot!

The pump generates additional heat when a different part of the machine has a gone wrong causing a minor or a major problem. Most advanced pumps are designed to dissipate heat through an air cooling system. However, when additional heat is generated over and above the normal heat capacity, then the pump might eventually fail to work. Overheating is just the start of the problems that can affect your pump..

Let’s Go Over a Few Common Reasons:

1. Friction



A pool pump is made of multiple moving parts. The main parts are the motor, impeller, and hair and lint trap. It’s normal for all the moving parts to generate heat from friction. They later cool down naturally as they draw air from the surroundings. Corroded bearings inside the pump generate friction. If the bearings are not replaced the pump gets hot. A rusty pump will make a squealing sound which is a sign that the pump’s bearings are generating friction at extremely high speed. At times minor leaks could generate friction and cause the pump failure too.

TIP: Check for the leaks and wear and tears regularly.

2. Lack Of Air Flow

Any electric motor must be installed in a place with proper air flow. The motor stays cool as it draws air to pull heat from the motor before passing out at the back of the pump. Make sure you don’t install itin an enclosed space. Without sufficient airflow, the motor will be overheat and cause eventual failure. The lifespan of a pool pump is minimum seven years. However, if you install it in inappropriate or confined spaces you are going to watch it die before its time.

TIP: Install in a spacious place with a roof shelter over itto protect from direct sunlight and let maximum airflow around the equipment.

3. Suction Side Restrictions

Suction Side Restrictions

Suction Side Restrictions

Just like all confined spaces, any restrictions that could hinder the flow in the plumbing system increases the workload for the pump. A residential pump should have 10x the pipe diameter. It should run without any obstruction, going into the pump. If the suction side of it is not designed well, the flow dynamics will not work as well as they should. Slow moving water has the minimum amount of friction loss. As water moves faster and becomes more turbulent, the efficiency of the water flow through the pipe decreases. 

TIP: Do not install a 90 fitting, street elbow, check valve, union or ball valve directly in front of the pump suction.

Prevention Is Better Than Repair

If the pool pump is coming to the end of its life you might have to call a professional or replace the machine. However, I am going to give a checklist that you can follow to maintain it and prolong its life. Best Pool Pump Reviews – Top Rated Single Dual and Variable Options.

1. Improve Flow Dynamics

Install at least 2 inches pipes for the plumbing system to avoid flow restriction. Avoid hard 90 degree fittings such as street elbows, as they  are a major flow restriction. Choosing the correct size  is very important, and avoid back to back fittings within the system whenever possible as this could cause serious turbulence and increase friction losses.

2. Fix All Leaks

Fix All Leaks

Fix All Leaks

Leaks are extremely dangerous. You will find leaks in the skimmer, filter or the plumbing line. If you notice the change in water levels, there might be an underground pool plumbing leak. Sinking, cracking or shifting of the pool deck is another sign that water is escaping the pool system somewhere. The method to eliminate leaks on your first attempt is to use Teflon tapes as well as 100% silicone. Apply three or four wraps of Teflon tape to the male threads, in the correct direction, and then apply a liberal amount of silicone on the tapes.

 Also, have a professional check the water pressure. Do not do it on your own as it’s extremely dangerous.

3. Rewind The Motor or Upgrade it

Take the pump to a motor repair shop, and a have the technician manually rewind the copper windings with new ones to prolong the pump’s life a little longer or if you can afford it then get a brand new pump as it costs same as rewinding the motor. Here at Poology we to love to bring most up to date information, and if you have more question feel free to email us.

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