Furnace repair cost in Saint Paul

$125 to $250 is a common diagnostic and trip range, with many repairs landing around $200 to $1,200 depending on the part and access as of September 2026. A filter or igniter is a different decision from a blower motor, control board, heat exchanger, or venting correction. Ask whether the diagnostic fee is credited toward work, what safety tests were performed, and whether the repair includes a warranty. A low quote that skips testing can become a second service call.