Ignition Control Boards
Before electronic ignition models were introduced, equipment such as boilers,
water heaters, and gas furnaces
relied on a standing pilot system. Standing pilot systems rely on a constantly lit pilot light. Now, with
electronic ignitions, it is possible to ignite the system without having to keep a pilot light on at all times,
thus saving money. The ignition control board or module has diagnostic indicators which will flash up if a
problem is detected. If the control board detects a problem in any sequence, then a lockout will be initiated
which usually lasts until the system is reset and deemed safe to operate.
Common Types of Ignition Control Boards
There are various types of ignition boards whose features depend on the type of ignition system in place. Boards
are available for:
- Direct spark ignition - no pilot lights
- Intermittent pilot ignition - pilot lights up when there is a call for heat
- Hot surface ignition - direct or indirect fire is applied to a pilot light
- Mercury bulb - a mercury switch is use to prove a flame on the pilot
How to Buy an Ignition Control Board
The easiest and safest way to purchase the right ignition control board is to use the manufacturer's part
number, the furnace serial number or furnace model. If using a replacement part, search for a compatible model
for the equipment you have.
Who Makes Ignition Control Boards?
For a long time, Honeywell was the major maker of ignition control boards for HVAC systems. Now, the following
companies all produce similar products.
