Hello The interlock switch located on the lower access panel broke so we replaced it with a compatable lever switch from Grainger and remounted. The Furnace now runs, however the blower now remains running constantly. We were unable to get the correct interlock switch since Carling the manufacturer did not put a model number on it and basically hung up on me when I called, love that customer service. Anyway I am wondering where to look next: is there one or two switches that I should check (fan switch and limit switch or is it most likely a combination switch?) Thermostat is old school with no continuous blower setting. Any help much appreciated.

Heating & Cooling - Dayton - Gas Furnace Heater