CTC Minor Gas Odor at Ignition

Furnace occasionally emits a faint gas smell at startup near the unit.

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

Slight delay in ignition, Small leak at gas valve fittings, Loose burner manifold connection, Dirty burners

How to Fix / Troubleshooting

Critical safety: If you smell strong gas or the odor persists, shut off gas at the furnace and contact your gas supplier or a licensed technician immediately.

Steps (for faint, brief odor only):

Ensure the furnace area is well ventilated.
Have a technician check burner ignition timing, clean burners, and verify igniter position.
A professional should perform a leak test on all CTC gas valve and manifold connections using approved leak detection solution.

Repair Difficulty

Professional Required 5/5

Required Part

CTC Combination Gas Valve

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