Pilot on, fan on, burners won’t fire up
Saturday I noticed no heat in office. Fan was blowing cool air. Sunday I turned heat up, same thing. Jiggled a few wires on the furnace and burners came on. This morning had the same problem, no burners lighting even after jiggling wires. Any ideas of what I can check before calling HVAC guy? Wires seem to be all connected ok.