WFCO 8955 question

Your WFCO is not going into boost must likely due to too small and to long a wire run to batteries. Like somebody else said run some much heavier wire, as heavy as will fit in the WFCO connections

I'm on of the lucky ones with the WFCO. Mine actually goes into boost quite easily if the batteries are low but my wire run is only about 5' and came from the factory with #4 wire.