What happens when the spa heater is in standard mode?
If the set temperature is higher than the displayed current water temperature, and the spa is in standard mode, then the control system will call for heat and the heater should start up with the pump on low speed (or the circ pump operating).
How to switch sensor A and B on M7 spa heater?
Switch sensors A and B at the board (for techs). If message changes to SnB or SENSOR B SERVICE RQD, then replace sensor, if not the problem could be with the circuit board. Same for Sensor B error. The 2 sensors may be out of balance if SnS appears.
Can a temperature sensor be replaced in a hot tub?
This may lead to unpredictable temperature accuracy. These sensors can also be difficult to replace. (If you ever need to replace a temperature sensor in a thermowell mounted to the spa shell, the rear of the sensor will need to be foamed back in after replacement to avoid incorrect readings from the cabinet temperature).
Why does my M7 spa heater keep overheating?
Press any button to reset (there is no auto-reset). The spa water overheat error message is OHS and it means one of the sensors has detected 110F degrees incoming water. This can happen if the filter cycle settings are improperly setup so the spa is constantly cycling (did you mix up AM and PM?). Otherwise maybe it is really hot outside?
What should I do if my hot tub heater is not working?
If the hot tub is gas-powered, you should check if the pilot light turned off and turn it back on. Another option is to replace the insulating cover since a damaged cover will affect the heating of the tub. The High Limit Switch If the temperature exceeds a certain value, usually 120°Fahrenheit, the high limit switch turns off the heat.
When to turn off the heater in a spa?
The Hi-Limit shuts off the heater or spa equipment when it detects a water temperature of 109° – 116°. The Hi-Limit on most newer spas can be reset by turning off the spa’s main power supply, and allowing the water to cool to below 100°.
Can You troubleshoot a hot tub heater problem?
Hot tub troubleshooting, as far as heating issues are concerned, is something that can be easily performed. There are a few things that must be checked to find out exactly how serious the problem is and whether it is necessary to call a repairman.
Why does my spa water heater not work?
The spa isn’t heating, or the water is a lot cooler than it used to be, but everything else seems operational. Your spa’s water passes through the filter before it moves on to the heater. If water flow is restricted by a dirty filter or debris in the Filter Housing, the heater may not operate.
What to do if your hot tub high limit switch is damaged?
Simply reset by pressing the big red button on your spa pack. The high limit switch may be housed in a thermowell. If the water temperature in the thermowell is the same as the water temperature in the rest of the spa, the switch is damaged and needs to be replaced.
