[Tom Goldman]

move the circuit breakers away from the radiator....the breakers can absorb additional heat from the radiator,and fool it into opening earlier than the rated current. ....breakers have a bimetal strip that moves when it gets hot,additional ambiant heat will lower the effective current rating of the breaker......Ideally the breaker should be located as close to the power source as practical......keep the relays, the voltage drop across a switch circuit on a cooling fan can be substantial. ....the purpose of the relay is to provide optimum voltage to the load while utilizing as little current as possible on the control side of the circuit. ......Tom