Gas Valve & Pilot Light Issues
Common causes of no heat in older furnaces. Here’s how to diagnose and fix them safely in Arlington & DFW.
Common causes of no heat in older furnaces. Here’s how to diagnose and fix them safely in Arlington & DFW.
Many older furnaces in North Texas still use a standing pilot light. When the pilot light goes out or the gas valve fails, you get no heat.
Caused by draft, dirt, or thermocouple failure.
Fix: Relight (older models) or replace thermocouple.
Valve doesn’t open to allow gas flow.
Fix: Professional replacement (safety critical).
Sensor that keeps the pilot light on fails.
Fix: Easy replacement in most cases.
Modern furnaces with electronic ignition have control board problems.
Fix: Diagnostic + board replacement.
Gas issues can be dangerous. If you smell gas, leave the house and call 911. For pilot light or gas valve problems, always use a licensed technician.
Annual professional maintenance catches gas valve and pilot light issues before they leave you without heat.
On older models yes, but follow the instructions carefully. Modern furnaces usually have electronic ignition.
Usually $450–$850 including labor. We carry common parts.
If you smell gas, yes. Otherwise, it mainly means no heat.
If it’s over 15–20 years old, we often recommend considering a new high-efficiency unit.
Don’t risk it. Our Arlington team is ready 24/7.