HVAC Refrigeration Guide — no heat

Daikin-McQuay Rooftop No Heat: Limits, Ignition & Freeze Stats

Oct 14, 2026

Troubleshoot Daikin-McQuay rooftop no-heat calls with checks for heat-enable inputs, airflow, high limits, ignition, flame rods, freeze stats, and outdoor-air sensors. Includes symptom-to-cause guidance and OEM part references for technicians.

Tags: Daikin-McQuay, Flame Sensors, Freeze Stats, HVAC Troubleshooting, Ignition Systems, Limit Switches, No Heat, Rooftop Units

Heil Quaker Furnace Flashing a Code? Here's What Every LED Pattern Actually Means

Jul 12, 2026

Heil Quaker/ICP furnace flashing a fault code? Decode the LED sequence, find the failed component, and get OEM parts that fix it right the first time.

Tags: Comfortmaker, control board, furnace repair, furnace troubleshooting, Heil Quaker ICP, HVAC diagnostics, ICP parts, inducer motor, LED flash codes, limit switch, no heat, OEM parts, pressure switch, Tempstar