Tag: symptom
All the articles with the tag "symptom".
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Lennox Furnace Not Heating - Causes & Fix
Usually a tripped safety switch, ignition failure, or pressure-switch fault. Identify the LED flash code at the control board first.
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Goodman Furnace Igniter Not Working - Causes & Fix
The igniter is likely failed and not glowing when voltage is applied. Verify the igniter receives 115–120 VAC during ignition.
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Goodman Furnace Blower Won't Shut Off - Causes & Fix
Most often caused by thermostat set to FAN ON or a short between R and G wiring. Set thermostat to AUTO or repair the wire short.
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Goodman Furnace Short Cycling - Causes & Fix
Most often caused by a dirty air filter restricting airflow. Replace the filter and check all vents before inspecting the flame sensor.
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Goodman Furnace Blowing Cold Air - Causes & Fix
Usually a dirty flame sensor or clogged filter stopping ignition or tripping a safety. Check thermostat settings, replace filter, and clean flame sensor first.
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Goodman Furnace Won't Turn On - Causes & Fix
Usually a pressure switch stuck open (3 flashes) from blocked venting or loose hose. Check the LED code, clear the flue, and verify the switch.
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Goodman Furnace Not Heating - Causes & Fix
Most often a dirty flame sensor prevents ignition lockout. Clean the sensor rod with fine steel wool, then check the LED code.
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Carrier Furnace Igniter Not Working - Causes & Fix
The igniter is worn out or has failed. A technician replaces the igniter and verifies the ignition sequence completes normally.
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Carrier Furnace Blower Won't Shut Off - Causes & Fix
Usually the thermostat fan switch is set to ON instead of AUTO, or the thermostat is sending a constant 24V signal to the G terminal.
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Carrier Furnace Short Cycling - Causes & Fix
Most often a clogged filter or dirty flame sensor. Replace the filter, clean the sensor rod, and check the thermostat placement.
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Carrier Furnace Blowing Cold Air - Causes & Fix
Usually a thermostat set to cool or fan-on mode, or a dirty filter causing airflow restriction and safety shutdown. Check settings first.
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Carrier Furnace Won't Turn On - Causes & Fix
Usually a thermostat call, tripped breaker, dirty filter blocking airflow, or failed ignitor. Check the LED status code on the control board first.
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Carrier Furnace Not Heating - Causes & Fix
Most often caused by a thermostat not calling for heat or a clogged filter tripping the limit. Check mode, setpoint, and filter first.
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Whirlpool Microwave Runs but No Heat - Causes & Fix
Usually a wrong setting (Control Lock, Demo Mode, or low power level) or a failed door switch, magnetron, or high-voltage diode.
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Whirlpool Microwave Buttons Not Working - Causes & Fix
Control Lock is usually enabled or the unit needs a power reset. Disable the lock or reset the breaker for one minute to restore function.
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Whirlpool Microwave Sparking - Causes & Fix
Most often caused by metal objects or grease buildup in the cavity. Remove all metal, clean thoroughly, and inspect the waveguide cover.
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Whirlpool Microwave Won't Start - Causes & Fix
Most often a door-switch problem or control-lock setting. Check the door fully closes, clear the lock, and test door switches.
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Whirlpool Microwave Not Heating - Causes & Fix
Demo Mode or Control Lock is active, or the door switch has failed. Exit Demo Mode, unlock controls, or test door switches.
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Whirlpool Microwave Turntable Not Turning - Causes & Fix
Usually caused by incorrect turntable installation or debris blocking the roller ring. Check tray seating and clean the track first.
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GE Microwave Runs But No Heat - Causes & Fix
Usually a failed magnetron or high-voltage diode. GE recommends service because the high-voltage capacitor stays charged even unplugged.
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GE Microwave Buttons Not Working - Causes & Fix
Usually a stuck program sequence or incomplete entry. Cancel any delay-start, power reset for 30 seconds, then test buttons again.
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GE Microwave Sparking - Causes & Fix
Most GE microwave sparking comes from metal objects left in the cavity or dirty, damaged waveguide covers. Remove metal, clean buildup, and inspect the cover.
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GE Microwave Won't Start - Causes & Fix
Usually a blown line fuse inside the unit. Turn off the breaker, open the cabinet, and test the fuse for continuity with a multimeter.
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GE Microwave Turntable Not Turning - Causes & Fix
Usually caused by a mis-seated tray, debris under the roller ring, or a failed turntable motor. Check alignment and clean first.