Gas Furnace Re: Blown Low Voltage Fuse The low voltage fuse provides protection for the control board and other low voltage components in the case of high amperage caused by a low voltage short or excess component load. ► The fuse must be sized per the "VA" of the transformer. Amps = VA...

York Gas Furnace: TM9T Re: Low Heat The furnace operates normally but the customer reports that it has difficulty keeping-up during cold weather. Qty Possible Causes: Mis-Wired Low Voltage 2 Low Gas Pressure Open Return Mis-Located Thermostat ...