Hot Tub Won’t Heat Past 95


You might look forward to stargazing while relaxing in your hot tub if you have one.

Unfortunately, heating issues frequently emerge, making it impossible to utilize the attribute.

If your hot tub heats up but does not heat past 95 degrees, it could be because the water entering the hot tub heater is insufficient to heat it appropriately.

An obstruction in the filter, a malfunctioning valve, or clogged pipes could all be to blame. 

Remove and replace the tub cartridge, clean the filters, and double-check the water pressure or flow rate to fix the problem.

Why Is My Hot Tub Heating Past Set Temperature?

In warmer weather, the air temperature out of your hot tub may exceed the specified temperature or climb a few degrees.

However, you need not be concerned because this is a common occurrence known as “Thermal Creep.”

Another prominent cause of summertime overheating is excessively long filter cycle duration settings.

How Do I Get My Hot Tub Hotter?

It is possible to increase the water flow through the hot tub heater elements by adding insulation to a hot tub, keeping the mode standard, and maintaining clean filters.

By following the steps below, the hot tub temperature will rise.

If you want your hot tub to be warm, be hotter:

  • You can raise the temperature to 104 degrees Fahrenheit and leave the pumps on all day.
  • The installation of a water heater can also quickly raise the water temperature.
  • Keep the lid on your hot tub as it heats up. Once the water reaches a temperature of 72 degrees or higher, the maximum range will be reached in about one to two hours.

Manufacturers of hot tubs typically impose temperature limits on their products due to safety concerns and to account for the normal body temperature. 

So, you need to set a temperature of 104 degrees Fahrenheit.

To ensure your own heater element is working properly, you should get a floating thermometer and examine it.

Hot tub only heats to 84 degrees

If the flow rate is too low, the temperature of your hot tub could begin to decline after it has heated up to 84 degrees.

When this occurs, it is usually because the filter is dirty or clogged and the pump has to be cleaned or replaced.

The filter may be disassembled and cleaned with little effort if it can be used more than once.

Problems with water flow can also be caused by other factors, such as insufficient water supply, closed valves, obstructed drain covers, and clogged pipes.

An expert can disassemble the device, inspect each component, and diagnose the issue before repairing it. 

The built-in thermometer may also be malfunctioning, especially if it is dial-style.

Possible causes include internal component failure due to prolonged use or corrosion of a sensor bulb. 


  • Jason

    Jason is an experienced writer, having contributed to many popular websites over the years. He currently writes for Big Hot Tub, a blog about everything hot tubs. When he's not writing or working on his blog, Jason enjoys spending time with his wife and two young children.