Pilot Light & Thermocouple Repair in Northglenn, CO
A pilot light that won't ignite or won't stay lit is one of the most common gas water heater complaints we hear — and it's usually a straightforward, affordable fix once diagnosed correctly. We specialize in quickly identifying whether the issue is the thermocouple, thermopile, gas control valve, or something else entirely.
Why homeowners choose us
- Upfront, written pricing before we start
- Licensed & insured local technicians
- Same-week appointments across Northglenn & the metro
- Permit & code compliance handled for you
- Workmanship warranty on every job
Signs you have a pilot light or thermocouple problem
- Pilot lights but goes out as soon as you release the control knob
- Pilot won't light at all, even with a fresh flame applied
- Water heater was working fine, then suddenly has no hot water with the pilot out
- Clicking sound at the gas control valve with no ignition
- Burner flame is present but the standing pilot flickers or is oddly colored
How we diagnose pilot & ignition issues
Visual & flame inspection
We check the pilot flame's size, shape, and color — a proper pilot flame should be a steady blue cone; a weak, yellow, or lazy flame points toward airflow or burner assembly issues.
Thermocouple/thermopile testing
Using a multimeter, we test the millivolt output of the thermocouple or thermopile, which is what tells the gas control valve it's safe to keep gas flowing. A weak reading means it needs replacement.
Gas control valve check
If the thermocouple tests fine but the pilot still won't hold, we inspect the gas control valve itself, which occasionally fails independently.
Venting & draft check
Drafts pulled down a vent pipe are a surprisingly common cause of a pilot blowing out repeatedly; we check for proper draft and vent condition.
Local considerations in Northglenn & the Denver metro
In Northglenn homes with the water heater in a garage or unconditioned utility space, cold drafts and combustion air supply issues are a more common cause of pilot problems than in fully conditioned interior closets. We check the combustion air path as part of every pilot/thermocouple diagnosis in these locations.
Frequently asked questions
What's the difference between a thermocouple and a thermopile?
A thermocouple simply signals the gas valve that the pilot is lit, using the pilot flame's heat to generate a tiny voltage. A thermopile does the same job but also generates enough power to run the entire gas valve electronics on some models, with no external power needed.
How much does thermocouple replacement cost?
It's one of the more affordable common repairs — the part itself is inexpensive, and replacement typically takes under an hour once diagnosed. We give you a firm price before starting.
Can I replace the thermocouple myself?
It's a manageable DIY repair for confident homeowners, but working around a gas valve requires care, and a poor connection can cause the same symptom to return. Many customers prefer a technician to confirm it's the actual cause before buying parts.
Why does my pilot light go out overnight?
This is a classic thermocouple symptom — it can hold the valve open while warm but fails as things cool, or it's simply worn out and giving an inconsistent reading. We test rather than guess.
Pilot light won't stay lit?
Call or text now for same-week installation and repair appointments across the Denver metro.
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