A number of things can make an old furnace pilot light go out including a strong draft a faulty thermocouple or a loss of gas.
Pilot lite roof top furnance.
Because of the move to higher efficiency models and the wide use of electronic ignition technology which improves.
The pilot light is used as a source of heat to ignite the unit.
If you re having trouble locating the pilot or thermocouple double check to make sure your unit actually has a standing pilot light.
How to light a pilot light standing pilot gas furnaces and water heaters are still around today even in newer homes.
A gas furnace s standing pilot in which the flame is lit at all times is sometimes referred to as a pilot light but no matter what you call it its purpose is to serve as a small ignition flame for the gas burner.
When the thermostat signals for gas to be delivered from the gas valve to the burner it is the standing pilot that ignites the gas flowing to the burners to heat the air in the combustion chamber.
This could cause the pilot to blow out when the furnace ignites.
How to light the pilot light to your furnace.
This is typically the problem if you can hear your furnace click on but it does not fire up.
Rust or dirt that falls on the burners can cause delayed ignition which would be like a mini explosion when the furnace tries to light.
The pilot light is a small flame that is either lit manually and remains burning around the clock or is lit electronically via an igniter when the machine kicks on.
The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite.
A faulty or dirty ignition or sensor is a relatively easy fix so follow these steps and you may be able to solve the problem yourself.
All the major hardware stores and hvac dealers carry standing pilot appliances.
Step 1 remove the panel on the unit that covers the pilot light compartment.
If your pilot light goes out all you need to.
The thermocouple isn t too difficult to find.
Standing pilot lights are common in older furnaces but many newer furnaces have intermittent pilot lights or hot surface igniters.
A modern gas furnace usually has an electronic spark generator to ignite the gas when the thermostat calls for heat.
Lighting your central air heating unit pilot light will take a few moments and is a straightforward procedure.
Come fall time or any time your pilot light might go out it is time to re light your pilot light.
Locate the pilot light and look for the tip of a copper rod very nearby.
In this episode of repair and replace vance shows how to relight the pilot light in a standing pilot furnace.
This usually happens when the furnace tries to light after it has been off for a while furnace is cold.