No hot water is usually caused by a gas pilot/igniter problem, a failed electric heating element, a tripped breaker, or a failing tank. Check the breaker (electric) or pilot (gas) first. If the tank is leaking or old, replacement ($900 to $3,000) may be needed. Request a plumber to diagnose.
Likely causes
| Cause | What's happening |
|---|---|
| Pilot/igniter failure (gas) | No flame means no heat; may need a part or relight. |
| Failed heating element (electric) | A common, fixable failure in electric units. |
| Tripped breaker or reset | Restore power or press the reset button. |
| Failing tank | Age or leaks may mean replacement. |
- Active tank leak
- Gas smell - leave and call your gas utility immediately
If anyone is in danger, or you smell gas, leave the home and call 911 or your utility immediately.
Frequently asked questions
What causes no hot water?+
Several issues can produce this symptom, from simple maintenance items to component failure. The likely causes table on this page lists what each cause looks like so you can describe the problem accurately when you request quotes.
Should I call someone right away?+
Call promptly if you see active water, no cooling during Arizona summer heat, burning smells, or repeated breaker trips. Otherwise, gather details and compare two written quotes before approving repairs.
Can PlumbAirAZ diagnose the problem?+
PlumbAirAZ is an Arizona plumbing and HVAC pricing and referral marketplace, not a contractor. We publish local price ranges and route your quote request to independent licensed service providers who contact you directly.
Related pages
Page Summary
- Topic
- No Hot Water
- Location
- Arizona
- Best for
- Homeowners diagnosing the issue
- Primary action
- Request a professional diagnosis
- Related services
- See related pages
- Last reviewed
- June 2026
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Last reviewed: June 2026
PlumbAirAZ.com is a pricing, education, and referral marketplace. We do not perform the work unless expressly stated. Your request may be shared with or sold to independent HVAC, plumbing, or home service providers that may contact you about your project.