The circulator relay panel did not have any lights on it. The breaker was tripped. Reset the breaker and about 1 minute later it tripped again. After resetting, checked the amps at the relay panel, 2.4 amps., there was a boiler is drawing 1.9 amps. That is not enough to trip a 20 amp breaker. There may be something else on the circuit or the breaker is going bad. Need to have an electrician take a look at the breaker.