How To Replace Pool Water Temperature Sensor? [Ultimate Guide!]


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The water in your pool is a reflection of your pool ownership. You want to keep it clean for obvious health reasons and also keep an eye on the temperature as the water can heat up quickly if it gets too hot. With normal pool maintenance, you will be checking the water temperature daily with a thermometer and testing for chlorine levels once or twice a month with a test kit. With those tests come problems that are easily avoided with regular checks from a temperature sensor. That’s why it is a good idea to replace the water temperature sensor in your pool once every year or two so you can continue enjoying your pool but also prevent problems that arise from hot water.

Why Do You Need To Replace The Water Temperature Sensor In Your Pool?

There are many uses for a pool temperature sensor. You can start by simply knowing the current temperature of the water in your pool. With a few simple clicks of a button, you can check the average daily temperature or create schedules to automatically check the temperature every other week or every month. Knowing the temperature of the water in your pool at all times is beneficial for several reasons. If you discover that the water is getting too hot or cold, you can adjust the temperature with ease using a touchless, digital controller rather than cycling through the whole process of finding the right mixture of chemicals to adjust the temperature with.

You should also check for leaks in your pool area that could lead to expensive repair costs. A pool temperature sensor could help you discover those slow leaks that eventually add up. Since the sensor is on the outside of your pool, you can also use it to track down other issues such as rotting decking or fencing. A regular check with a water temperature sensor could also help you determine when it’s time to change the water filters so you can keep your pool clean and healthy.

How Do You Install A Water Temperature Sensor In Your Pool?

Installing a pool water temperature sensor is very straightforward and can be done by anyone with basic know-how. The first step is to remove the old sensor and then install your new one. The second step is to program it for the type of pool you have and the expected usage. There are specific instructions online that can help you program your sensor easily without needing to call in a professional.

How To Replace A Pool Water Temperature Sensor?

Since you will be replacing the sensor once every year or two, it’s important to find a way to disassemble it easily without any tools so you can clean it thoroughly before reassembling. After removing it, you will need to take out the old one and then replace it with the new one. To remove it, simply push down on the top of the cylinder and it will come out. Be careful not to touch the wires as they could short out if you are not careful.

Before replacing the sensor, it’s important to check if there are any electrical connections on the back that could cause damage if contacted by water. If those are accessible, then make sure to disconnect them before you reassemble the unit. Otherwise, you could end up with a damaged pool.

To install the new sensor, you will need to push it tightly against the outside of your pool wall until it clicks into place. Make sure to clean the area around the pool wall before you push it in so there are no odds of it coming out easily. If that’s the case and you decide to take it out again, it will be a lot easier to do so as you will only have to press down on the top of the cylinder to remove it. That way, there will be no broken nails caused by trying to remove it with tools.

Once you have replaced the water temperature sensor, it’s time to test it and see if everything functions correctly. Make sure to read the instructions that came with the unit to ensure you have rewired everything correctly. Otherwise, you could end up with a lot of trouble when the pool is turned on.

Ensure that the area around the pool is free of any debris that could affect the operation of the sensor. If there are any branches or twigs near the area where the sensor will be pushed against the wall, it could cause malfunctions. You should also check for any cracks or holes in the cement around the pool that could allow water to seep in and cause trouble. A steady trickle of water over a period of time could cause the sensor to become inaccurate.

If you decide that the area around the pool is satisfactory, it’s time to reassemble the entire unit including the wire connections. Once you have done that, make sure to test the unit again to ensure it is working correctly. If everything is okay, then you can sit back and enjoy your pool without any worries regarding the water temperature.

Before you reconnect the electrical wires, check for any signs of water damage. If there is mildew on the insulation around the wires, it could mean there has been excessive moisture in the area. If the insulation is damaged in any way, it could be a sign that there has been a leak in your pool which could lead to serious problems. Check for any wet spots on the exterior wood surfaces around the area where the sensor will be connected and if those are present, then there has probably been some water damage.

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