The Temperature Setting on My Hot Tub Reads 105 Degrees but It Feels Like 100 Degrees

Hot Tub Not Heating Enough? x Reasons Why

This content was previously featured on the Hot Tub Works website. Leslie's is proud to partner with Hot Tub Works to bring yous this helpful content on lesliespool.com.

If the water temperature is warm, but non quite as hot equally you like, you've come to the correct identify! If your hot tub is not heating properly, at that place are a number of things that could be going on. Whether it's depression pressure, power issues, faulty parts, or fifty-fifty insulation bug, it's important to place the root of your heating problem.

Some hot tubs tin can oestrus upward to 105°, although the recommended maximum temperature for healthy adults is 104°. Let's presume that there are no error codes  on the display console. Everything seems normal, just the water is not as hot equally it commonly is. At this bespeak, there are a few troubleshooting steps you can take to place and set the trouble(s) in your hot tub.

1. At that place's an Effect With the Heater

If your heater's not heating, the get-go thing to bank check is the heater itself. Most hot tub heater elements have a lifespan of about v-10 years. Check wires and connections to the heater, and ensure all connections are tight. Expect for signs of frayed, chewed, or burned wires, and make sure that there is power coming to the heater. If you detect that the coating around the filament of the heating element has any cracks or chips, the chemical element should exist replaced.

DIY TIP: Rule out ability problems by testing for voltage coming into your spa pack, then verify that the voltage is reaching your heating chemical element. Sometimes a bad contactor can prevent voltage from reaching the element.

If you are comfortable testing voltage, you tin can check the volts on the heater terminals with a multi-meter or Ac volt meter. Ready the meter to AC volts, with a setting college than 240V. With the thermostat turned up and the pump running on high, touch or clip each meter atomic number 82 to each terminal (at the same time), and you should see 220 volts or something pretty shut (215-225V). If you get 220V but no heat, this commonly means that the heater element is bad. If you don't get any volts while testing the heater leads or terminals, check that GFCI outlet or excursion breakers have not tripped.  Make sure the thermostat is turned up. If you yet get nothing, the circuit lath is probable bad.

Another thing is to check for continuity. With ability off, identify your multi-meter on the lowest Ohms setting, and touch each lead to each terminal at the aforementioned time. If the meter doesn't motility, the element is bad. If the meter does movement and shows steady resistance, the element is probably good, only there may be a brusk. Once again, audit the element for cracks or chips.

2. Hot Tub Embrace is Inefficient

In some cases, if it seems like your spa or hot tub is non heating enough, the problem could actually exist your your cover. An economy spa cover is not going to provide the same heat trapping efficiency of thicker and denser spa covers. The R-value of theall-time spa covers tin be 3x the R-value of a basic economy level spa encompass.

Secondly, as spa covers age, they tin can commencement to take on water and sag in the middle. Other covers begin to rip on the edges or forth the fold. If you see steam seeping out of the sides of your spa cover, this tin can be enough heat loss to reduce overall spa temperature.

Finally, you have to keep the encompass on the tub while it's heating. Otherwise, your spa or hot tub will never heat up. For increased estrus trapping efficiency, apply a floatingspa blanket.

3. Thermostat is Not Calibrated

On older gas-fired spa heaters and old hot tubs with mechanicalthermostats (without whatever digital console display), the spa thermostat tin can be adjusted. These thermostats have a copper wire and capillary seedling used to sense the water temperature. On the stop of the switch is a i/8" hex head adjustment spiral. Turn information technology 1/4 turn clockwise, and give information technology a few hours to see how high the temperature rises.

Test water temperature before using, and exist careful non to raise the temperature above 104°. Although some hot tubs have condom measures in place to prevent this from happening, it is possible to exercise on some hot tubs. Adjusting the gear up indicate besides high tin be dangerous or unhealthy for spa users. Information technology'southward likewise possible that the thermostat is defective – they don't ordinarily just exit of adjustment by themselves.

4. Outside Temperature is Too Low

Some spas and hot tubs are just not able to overcome low exterior temperatures, which can make it seem like it'south not heating enough. Especially for 110V plug-in portable spas, or spas built without a lot of insulation, a minor 1-3 kw spa heater can non warm the water fast enough to overcome heat loss. This is also true for spas and hot tubs that take smallheater elements under iv Kw or iv,000 watts. The fact is, less expensive spas volition have more trouble keeping up with low outside temperatures.

Using a top quality spa cover, floating spa blanket, improving insulation underneath the spa shell, and even wrapping the outside of a wood hot tub can all help to compensate for low air temperatures.Spa heaters tin besides be upgraded and up-sized.

five. Bad Sensors or Switches

Mod spas use electronic temperaturesensors andhigh-limit switches to constantly check water temperature, inside and outside of the spa heater. These are connected by wires to a plug-in on the main control console.

On digital spa packs, you lot volition normally see an error code (Sn, Sn1, HL, Hot, OH) when a temp sensor is causing the heater to shut off. But if the sensors aren't calibrated and are off by a few degrees, a temperature sensor or thermostat can shut off the heater, thinking the spa is hotter than it is. Occasional tripping of the high limit switch is a bit of a nuisance, simply not overly uncommon. All the same, frequent tripping bug can bespeak depression menstruation, a malfunctioning heater element, or sometimes even a bad high limit switch.

When your spa filter, suction intakes, or return jets are chock-full, blocked or obstructed, the pressure level switch will stay airtight and continue the heater from working. The same happens if your pump is on depression speed, or if valves are closed. Many spaforce per unit area switches are adaptable from 1-5 psi, and when the internal diaphragm fails it requires replacement.

6. Using the Air Blower

Using a forcedair blower or opening the air intake knobs will ever cool the water, because the air temperature is often much colder than the water temperature. If this is causing issues during cooler weather, you may want to turn the blower off.

7. Spa Heater Not Running Long Enough

Spas and hot tubs estrus slowly. Some heat up as piffling equally 1ºF per hour, although almost can do ii-4ºF per hour. If thetimer is not set to run long plenty each twenty-four hour period, the heater can have problem keeping upward. This is specially true when outdoor temperatures are low.

To bring your h2o temperature up to speed when it seems similar the hot tub isn't heating, run the circulation pump and heater continuously on loftier speed (some heaters volition non operate with the pump on low speed). Information technology can take up to 24 hours, depending on starting water temperature, outside air temperature, spa cover efficiency, and, most chiefly, the size of yourspa heater.

eight. Filter is Dirty

Earlier in the article, we agreed to presume that at that place are no fault codes. Withal, a dirty spa filter volition usually produce an error code (FL, Flo, FL1) if thepressure switch is sensing low period and keeping the heater off.

Yous can remove the spa filter (spa cartridge) to see if catamenia improves because of a dingy spa filter. In this instance, you may need to hit the heater element's reset push. Cleanspa and hot tub filters every 3-4 months and replace every 12-24 months to keep the hot tub water flowing and filtering well.

DIY TIP: If your filter is clean and in good condition, attempt troubleshooting other reasons for low flow charge per unit in your hot tub. If your circulation pump has a strainer basket, check to make sure it'southward clean. Obstructed suction inlets, clogged pipes, or clogged pump impellers can all crusade flow problems, equally tin obstructed outlets, closed valves, closed jets, and air in the pump. If all else fails, low flow errors are sometimes the issue of a faulty pressure switch (see #five above).

9. Spa Was Just Drained and Refilled

For spas that have beendrained and refilled, you lot may want to run the heater continuously for a solar day or two until the water gets hot once more. Once heated, reset the time clock to run for 4-8 hours daily, or every bit much as it needs to maintain most of the heat.

Also, be sure that the spa circulation pump is fully primed and notair locked or drawing in air. Both of these conditions will cause a heater to overheat and shut off. If this happens, you may need to hit the heater element reset push button.

10. Spa Water Level is Depression

If your spa skimmer begins to depict in a steady stream of air in a vortex inside the skimmer, or if it gulps down air considering of a stuck skimmer door or thermometer, this will crusade the heater to overheat and shut down. You lot may need to hitting the heater chemical element reset button if this happens and so your hot tub can start heating once more.

Add water regularly to your spa to proceed the level from dropping likewise low and drawing air into the suction intakes.

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There you lot take it! When you're having problems with cool hot tub or spa water, these 10 issues are likely to be the culprit. If you're looking for more data about various problems with hot tub heaters, take a look at our popular weblog post, "Pinnacle 5 Hot Tub Heater Issues."

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