I have a Thermal Zone 5 ton gas package unit Model R4GA-048K120C, When the unit is turned off the blower & gas exhaust blower runs at all times. In the heat mode on the blower will kick off when the heat chamber heats up & will come on in a min. or 2 like normal, but when the heat kicks off both blowers stay on. In the AC mode they both blowers run at all times. The status led flashes 1 time then stays off for about 5 sec. then flashes 1 time again. The index says 1 flash is Limit Circuit Open. I tapped on the relays and one clicked & the blowers turned off but cane back on.