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Older style tubs have a pressure switch usually mounted directly on the heater manifold, or attached to the plumbing. The pressure switch is connected to the spa pack/circuit board with 2 wires and shuts the heater off if there is not enough pressure in the heater tube/manifold to protect the heater from becoming damaged or even exploding or causing a fire in a dry heater condition. Newer spas that use Balboa controls have sensors built right into the heater so a pressure switch is no longer needed as the safety function of monitoring the heater for constant water pressure is now all performed within the heater on newer quality spas.
Check all of the following............. 1. Pressure switch. 2. Pressure switch pigtail. 3. A/C heater controller.........
If you are talking about a wall switch for the heater, check to see if the heater has its own internal thermostat or switch as this might be in the off position and not allow the heater to turn on. If you are talking about a switch on the heater itself, then yes in all probability the switch is not working.
Where is heater control switch
yes it will shut down. the low pressure switch will shut it down.
Where is the heater relay switch on a 2005 MalibuRead more: Where_is_the_heater_relay_switc
IT turns the heater on and off!
Depending on the year, make and model check the following.............. 1. Freon level. 2. Pressure switch. 3. Pressure switch pigtail. 4. A/C clutch air gap. 5. A/C heater controller. 6. Electrical for the system.
It could be the high speed heater motor relay is stuck on or the switch itself is broken.
A pressure switch reads pressure not level.
Check the following.............. 1. Freon level. 2. Pressure switch. 3. Pressure switch pigtail. 4. A/C clutch air gap. 5. A/C heater controller. 6. Electrical for the system.
A restricted/plugged heater core can do that. Try flushing the heater core.