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Tankless Water Heater Installation & Repair

Fast diagnostics • Honest options • Locally Owned- Serving Des Moines Metro & surrounding communities

GEM Heating & Cooling provides tankless water heater installation and repair across the Des Moines Metro & surrounding communities. If you’re getting error codes, inconsistent hot water, or you’re ready to upgrade from a tank, we’ll diagnose the issue, recommend the best next step, and walk you through clear options before any work begins. We service most major tankless brands and install properly sized systems with correct venting, gas line requirements, and safe operation verified.

Common Tankless Service Calls:

  • No hot water / inconsistent temperature

  • Error codes or unit won’t fire

  • “Cold water sandwich” / temperature swings

  • Low hot water flow / takes too long to get hot

  • Mineral buildup / needs flush & descale

  • Venting or condensate drain issues

  • Ignition/flame failure / sensor issues

  • Water leaks at connections or isolation valves

Tankless Services We Handle

  • Tankless installation & replacement (proper sizing)

  • Troubleshooting + repair (gas/ignition/sensors/controls)

  • Annual flush & descale (recommended)

  • Venting/condensate drain setup & corrections

  • Gas line / shutoff / isolation valve upgrades (as needed)

  • Water connections + leak diagnosis

  • Temp setting + homeowner walk-through

Our Tankless Service Process

  1. Diagnose & confirm — We verify error codes, flow rate, gas/venting basics, and water quality factors.

  2. Clear options — Straightforward repair vs. replacement recommendations and pricing.

  3. Repair/install & verify — We complete the work cleanly, confirm safe operation, and test hot water delivery.

Ready for a Tankless Water Heater replacement quote? Book online or call to schedule.

Tankless Water Heater FAQs

Why am I getting a tankless error code?

Error codes commonly point to airflow/venting issues, gas supply problems, ignition or flame-sensing faults, scale buildup, restricted water flow, or sensor/control issues. We’ll identify the root cause and confirm proper operation after repairs.

Why does my tankless water heater go cold during a shower?

This can happen from low flow, a clogged inlet screen, scale buildup, temperature settings, or a unit that’s not keeping up with demand. We’ll test flow and performance and recommend the most cost-effective fix.

Do tankless water heaters need maintenance?

Yes. Many homes benefit from periodic flushing/descaling (frequency depends on water quality and usage). Maintenance helps prevent scale buildup, improves efficiency, and reduces breakdowns.

Why is my tankless making noise or running a lot?

Noises can come from scale buildup, restricted flow, or normal operation under heavy demand. We’ll inspect and test performance to confirm whether cleaning/maintenance or a repair is needed.

Is a tankless water heater worth it?

It depends on your household size, hot water usage, and current setup. Tankless can be a great fit for many homes—our team will explain the pros/cons and help you decide what makes sense for your budget and goals.

Do you work on gas and electric tankless water heaters?

Yes—our team services and installs both gas and electric tankless systems, depending on your home’s utilities and what’s appropriate for the application.

What should I check before I call?

If it’s safe to do so: confirm power is on, check any visible shutoff valves are open, and note any error code on the display. If you smell gas or suspect a safety issue, shut the system down and call right away.

Do you service most tankless brands?

Yes—GEM Heating & Cooling services most major tankless water heater brands and will recommend the best repair or replacement path after diagnosis.

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