I have a HU2 Dreammaker Spa. It will not heat past 60 degrees. changed heater and sensors,still nothing. no error codes

If your Cancun lazy spa is not heating past 38 degrees Celsius (100.4 degrees Fahrenheit), there could be several reasons for this issue. Here are some troubleshooting steps you can try to resolve the problem:

1. Check Water Circulation: Ensure that the water is circulating properly in the lazy spa. Make sure the water pump is functioning correctly and there are no blockages in the water flow.
2. Water Level: Check the water level in the lazy spa. If the water level is too low, it can affect the heating process. Ensure that the water level is above the minimum level required for proper heating.
3. Heater Unit: The heater unit may be malfunctioning or not working at its full capacity. Check for any error codes or indicators on the control panel. If there are error codes, consult the user manual to determine the issue.
4. Temperature Sensor: There might be a problem with the temperature sensor. If the sensor is not accurately reading the water temperature, it could prevent the lazy spa from heating properly. You might need to replace the temperature sensor if it's faulty.
5. Electrical Connections: Ensure that all electrical connections are secure and there are no loose wires. Faulty connections can lead to heating issues.
6. Power Supply: Make sure the lazy spa is receiving the correct power supply. It should be plugged into a dedicated power outlet that can handle the load required for heating the water.
7. Ambient Temperature: Cold weather can impact the ability of the lazy spa to heat up efficiently. If the outside temperature is significantly colder than the desired water temperature, the heater might struggle to maintain higher temperatures.
8. Thermal Blanket or Cover: Use a thermal blanket or cover designed for lazy spas to help retain heat. This can prevent heat loss and assist in maintaining the desired temperature.
9. Filters and Water Quality: Clean the filters and ensure the water is well-balanced and properly treated. Poor water quality can affect the heating process.
10. Timer Settings: Check the timer settings on the control panel. Sometimes, the spa might be set to a lower temperature or a timer might be restricting the heating.
11. Reset: Try resetting the lazy spa by turning it off, waiting for a few minutes, and then turning it back on. This can sometimes resolve minor issues.

problem can be control -stat sensor or heater - heater problems usually dont throw codes

Water Temperature Sensing Error

A) Inlet water temperature sensor is reporting a temperature in excess of 104 degrees. Normal operation resumes 2 minutes after inlet water temperature sensor reports temperatures of 104 degrees or less. This error functions in both normal and remote thermostat modes.
or

B) Inlet water temperature sensor is reporting a temperature change at a rate faster than 6 degrees in 60 seconds, indicating a potentially damaging low water flow condition. Normal operation resumes when temperatures stabilize. If this condition is detected 3 times, the heater will lock-out until the electrical power is cycled off and back on.

HS
Water Temperature Sensing Error

A) Inlet water temperature sensor is reporting a temperature in excess of 104 degrees.
Normal operation resumes 2 minutes after inlet water temperature sensor reports temperatures of 104 degrees or less. This error functions in both normal and remote thermostat modes.
or
B) Inlet water temperature sensor is reporting a temperature change at a rate faster than 6 degrees in 60 seconds, indicating a potentially damaging low water flow conditon. Normal operation resumes when temperatures stabilize. If this condition is detected 3 times, the heater will lock-out until the electrical power is cycled off and back on.

if the spa does not heat up to 104 degrees then the temp sensor is what you are going to need.
Are there error codes showing on the screen of the topside?
You will need to know the model number of the control box or the model number of the heater tube in order to get the proper sensor.


Rod
US Parts Center
888-521-6183