Gas Water Heater Repair & Installation in Glendale, CO
Gas water heaters need correct venting, combustion air, and altitude-appropriate setup to run safely and efficiently. We install and repair gas units to code, every time.
Gas water heaters remain the most common type in Denver-metro homes with existing gas service, largely because gas recovers hot water faster and typically costs less to operate than electric resistance heating. But a gas unit is also the type most affected by installation quality — venting has to be sized and routed correctly, combustion air has to be adequate for the space, and the burner has to be set up correctly for the altitude it's operating at.
We install and repair both standard atmospheric-vent gas tanks and power-vent models, which use a fan to push exhaust out through a smaller PVC vent rather than relying on a traditional metal flue — a common upgrade when a straight vertical vent path isn't available.
Signs of a gas water heater problem
Gas units have some failure modes electric units don't. Watch for:
- A pilot light that won't stay lit or takes several tries to light.
- A yellow or flickering burner flame instead of a steady blue one.
- Soot or dark staining around the burner access panel.
- A burning or rotten-egg smell near the unit.
- Popping or rumbling from inside the tank (sediment insulating the burner).
- The water heater's exhaust vent feels warm to the touch along its length, or you notice condensation dripping from it.
How we handle gas repairs and installs
Gas work carries real safety stakes, so we're methodical about every step.
Gas supply and venting check
Before touching the unit itself, we verify gas pressure, line sizing, and venting condition — a lot of 'unit' problems are actually supply or venting problems.
Combustion and safety test
We test for proper draft, check for backdrafting or spillage at the flue, and confirm there's no carbon monoxide leaking into the living space.
Component repair or unit replacement
Thermocouples, thermopiles, gas valves, and igniters are replaced as needed; if the tank itself has failed, we move to replacement.
Altitude-correct setup
On new installs, we confirm the unit's burner orifice and input rating are appropriate for our elevation, rather than assuming a sea-level default will perform correctly.
Final combustion test
After any repair or installation, we re-test flame quality, draft, and (where applicable) carbon monoxide levels before we consider the job complete.
What gas water heater service typically costs
Gas repairs vary by which safety component failed; installations vary by venting type and gas line condition.
| Service | Typical range |
|---|---|
| Thermocouple/thermopile replacement | $180 – $340 |
| Gas control valve replacement | $260 – $500 |
| Standard atmospheric-vent tank installation | $1,600 – $2,900 |
| Power-vent tank installation | $2,200 – $3,800 |
Venting distance and access are the biggest cost drivers on gas installs. We confirm exact pricing on-site.
Gas appliances and Denver's elevation
At roughly one mile of elevation, the air is thinner, which means less oxygen is available per cubic foot for combustion than a gas appliance rated at sea level assumes. Manufacturers publish altitude de-rating tables specifically for this reason, and installing a gas water heater without accounting for it can mean poor combustion, soot, and reduced efficiency — even if the unit is brand new. We check and apply the correct setup for our elevation on every install rather than treating it as an afterthought.
Combustion air is also a bigger consideration in Glendale's tighter mechanical closets, common in condo and apartment construction, than in a spacious basement. Where a closet doesn't have adequate combustion air openings, we'll address that as part of the job — it's a safety issue, not a nice-to-have.
Gas water heater questions we hear most
Is it dangerous if my pilot light keeps going out?
It's not usually an immediate hazard by itself, but it does mean a component (thermocouple, thermopile, or gas valve) isn't functioning correctly and should be diagnosed rather than repeatedly relit.
Can you convert my atmospheric-vent unit to power-vent?
Yes, this is a common upgrade when a straight vertical vent isn't available or when we need to relocate the unit. It requires the appropriate power-vent model and PVC venting.
How do I know if my water heater is venting properly?
Warning signs of poor venting include soot near the draft hood, a persistent burning smell, or condensation on the vent pipe. If you suspect a venting issue, don't wait — call us to check it.
Do you check for carbon monoxide during service?
Yes, checking combustion safety and venting performance is a standard part of any gas water heater repair or installation we perform.
Ready to get your hot water sorted?
Talk to a technician now, or request a free written quote online.