Phalaenopsis in general,require heat to grow, and lower temperatures to flower. The dividing line is in the low 60's say 17 C. Above 25/75 they won't initiate a new spike, but will grow new leaves ; below 15/60 they won't grow new leaves but will spike. . Of course these figures are approximations, but the general idea is keep them warm to grow, and if they don't seem to want to flower, cool them off.
In Taiwan they do this alternately for the big specimens seen at shows, so that every time they start to develop buds they heat them up - stops the buds, and the plant grows some more leaves, then cool them down to start some more spikes. This way they can produce plants with hundreds of flowers on each - and maybe a dozen pairs of leaves all 12 inches long. .