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Ok, if this is a heated tub then it is possible that it works off of 220-240 Volts AC. Either you have a disconnect close to or connected to the tub, or it may be wired directly to the main home panel. One side of the 220 volts circuit breaker may be tripped. (being that what makes up 220 volts is two lines of 120) Your circuit breaker may look like it is not in the tripped position, so shut off the circuit breakers then turn them back on again and see if that may have helped.
I don't know this model but most hot tub have a micro switch on the valve that starts the compressor to confirm turn the power off then removing the access panel and take the wires of the switch and connect to gether then turn back on if the compressor is working then the switch needs replacing if it is not workin the the compressor is faulty
Is the board getting power, is the control lighting up? Do you see any error codes on the top side control? Improper flow will give you an error code, caused by flow issues or a faulty flow switch. Make sure all gate valves are open and the water can flow freely. If not then check your Hi Limit sensor. This is the overheat safety sensor if it fails the tub will not function at all.
If it is what I think it is no parts are needed and the fix is pretty easy. The water level switch works on air pressure. It has a tube mounted on it that comes from the base of the tub. As the water level rises the air tight tubing transfers the air pressure to a bladder inside the switch. The switch has a hot wire and a wire to the water valve and a wire to the motor. When the tub fills the air pressure switches it from fill to wash. So what went wrong? Sediment in the tub has the air passage blocked, a hole is in the tubing, or it simply vibrated off the switch. Check and see if the tube is blocked. Blow out the sediment. and re-secure the tub then remove any water to that the pressure can build once more and she oughta act all propah.
The problem is that the flow switch for your water heater is indicating no flow. Therefore your water heater will not operate. Without proper water flow your heater will burn up. Check that your valves are open. Check that your pump is running. Check that your filters are properly installed and not restricting flow. Check the wiring to your flow switch and make sure the flow switch operating properly (i.e. put a ohm meter across the contacts and see if you have continuity when the switch closes).
What I did was (but be VERY VERY carefull) is have the fan plugged in, and check which wires give which speed when you touch the main wire. VERY carefull. I'm not liable for any harm done to you or your fan.
On a 3 speed switch you usually have 4 terminals, and they are marked L1, 1, 2 and 3.
L1 which is line voltage from the electrical cord or wall plug, #1 low speed usually a red wire from motor, #2 medium speed usually a blue wire from the motor and #3 high speed usually a black wire from the motor. That is if the fan is low,medium and high, if it says high, medium and low then reverse #1, #2 and #3
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