Won't come on the light for the small and big pool is flashing

need more info how big is pool you should be between 2700 and 3400 parts on salinity if so with warning check sensor

1/4" nut driver didn't work? It's pretty much universal but there may be exceptions.

How big a pool? You normally will not notice a temperature rise immediately. On average, swimming pools will see a one degree rise in temperature every 45 - 90 minutes.

use the diagnostic system in accordign with the inst.manual or download free www. retrevo.com or www.fitness.manualsonline.com

God bless you

It may be a loose solder on the circuit board where the spade connector is set into the printed board. Not easy to see but there may be a hairline crack. I've repaired this issue with a small soldering iron. From the factory wires are secured by zip ties or some sort of fastener, and pulled tight. This sometimes does harm to the board. That red light may have some small letters next to it on the board indicating a fault, and you moving the wire was actually a loose connection that reset it. And the loose connection had nothing to do with the main issue at hand. The red blinking light may be a trouble code also. Count the blinks, or if continuous, may give a fault code. Most pool heaters I've worked on have issues with high limit, meaning the unit faults due to overheating. And many times I've had the maintenance guys back flush at the pool filter/pump system, cycle off the heater(furnace) at the main power disconnect or breaker, and power it back up. Simply turning off the switch on the unit may not reset it. Be safe and ensure all wires are place back to their original position and that all voltage is turned off when servicing. And that all run capacitors are properly discharged before servicing. Hope this helps!

I would say the problem is the thermistor. The board will light up, the SW switch is green, but you get a display that flashes dashed lines and then what looks like 888. That is a start up code. The thermistor is located on the side where the water enters the heater. There are two screws at the top of the side panel. Undo the screws and lift the panel off. The thermistor is a probe with 2 small wires coming out and lead to the control panel. It is a very simple fix and is usually the problem if you have not experienced any other issues. The part runs between 30 and 45 dollars. Most pool stores would carry this.
thanks let me know if that fixed the problem

Most of the time I have found the problem to be the thermistor. It is located on the water manifold of the heater. Usually the panel lights, flashes then to 888 and back to dashed lines. SW light is green, and service light is red. It costs 25 to 45 dollars, and takes 5 minutes to repair. New thermistor looks identical to old so replacing it is very easy.
thanks please let me know if this was helpful

my wall climber only wants to climb the walls. it won't run in a straight line. it only cleans a small part of our pool.