I only like electric water pumps on drag cars where you go 1/4 mile and then you can circulate the water and electric fans pull air while adjusting valves / packing chute/refuel for next round.

An electric water pump and/or fans set up with thermostat and or temp sensors/relays is over the top for basics to go wrong.

Where is your temp sensors located and are your fans or H2O pump on temp controlled relays?