Indianapolis experiences 25 to 35 freeze-thaw events each winter. Daytime temps climb above freezing, then drop back into the 20s overnight. This cycling stresses metal furnace components through constant expansion and contraction. Heat exchangers develop stress cracks at the weld seams. Flue pipes separate at the joints. Condensate lines freeze solid, then thaw and leak water into the blower compartment. Your furnace blowing cool air during February often traces back to damage that started during the wild temperature swings in December and January.
Reliance HVAC Indianapolis technicians live and work in Marion County. We see the same weather patterns affect your furnace that affect ours. This gives us practical knowledge about which components fail first when temperatures swing 40 degrees in two days. We know the ductwork in Irvington homes runs through uninsulated attics where cold air infiltration dilutes heated air. We understand that Meridian-Kessler houses built in the 1920s often have oversized furnaces that short-cycle and create uneven heating. Local expertise matters when diagnosing why your heating system blowing cold air fails during the coldest weeks.
