Raypak No Ignition Without Fault Code

Boiler fan runs but burners do not light; no error code displayed.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Weak igniter not reaching ignition temperature, Gas valve coil open or stuck closed, Ignition control not sending signal to gas valve, Loose wiring in ignition circuit

How to Fix / Troubleshooting

Safety: Turn OFF power and gas before working on ignition components.

Steps:

Listen for the igniter: hot surface igniters will glow; spark igniters will click. If there is no ignition attempt, the igniter or control may be faulty.
Inspect igniter and gas valve wiring for loose or damaged connections.
A technician should test igniter resistance and verify voltage to the gas valve during ignition.

Because gas and ignition diagnostics involve live testing, this fault is best handled by a qualified technician.

Repair Difficulty

Professional Required 5/5

Required Part

Ignition Control Module

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