In Cumming, GA, Comet Appliance Repair excels at Rinnai appliance repairs, earning trust with years of hands-on experience. Our team brings factory training and proven expertise to every installation, diagnostic, and repair of gas and tankless units. We service all makes and models with care.
With ongoing certifications and a commitment to safety, we deliver precise troubleshooting and code-compliant fixes. Call (770) 215-0473 or tap (770) 215-0473 for expert service today.
Our primary service is Rinnai water heater repair in Cumming, GA 30041, focusing on reliable diagnostics, rapid fixes, and extended performance for your home or small business. We specialize in Rinnai tankless systems, handling common issues such as temperature inconsistency, cold-water bursts, ignition problems, and mineral buildup with precision and care.
Our certified technicians perform thorough diagnostics to identify root causes before any repair, ensuring we use OEM parts when needed and test the system afterward to verify safety, efficiency, and consistent hot water delivery in your space.
Choosing professional service for your Rinnai hot water unit helps improve energy efficiency, prevent costly outages, and extend equipment life. We emphasize safe operation, proper venting checks, and maintenance tips that keep your system performing at peak comfort levels.
We work every day, 6 AM - 10 PM, to fit your schedule. For prompt assistance or to book a visit, contact us at our local team in Cumming, GA 30041. (770) 215-0473
Take advantage of our offer: $25 OFF First Time Customers. We also back repairs with a warranty, 90 Days Parts and Labor, giving you confidence in parts, workmanship, and ongoing hot water reliability.
Fast, same-day repairs for appliances and HVAC in Cumming, GA 30041.
Local, certified pros for fast, reliable appliance & HVAC service in Cumming, GA.
Trusted appliance & HVAC repairs by licensed, insured pros in Cumming GA.
One-stop pros for appliance repair and HVAC, saving time & hassle in Cumming.
$25 OFF First Time Customers
Double Wall Oven Repair
Oven & Stove repair
Kegerator Repair
Freezer Repair
Refrigerator repair
Washing Machine repair
Buld-in Microwave Repair
Dishwasher repair
Dryer repair
Stackable Washer and Dryer Repair
Water Heater repair
Wine Cooler and Cellar Repair
Garbage Disposal repair
Air Conditioner Service
Termostat Repair
Furnace Repair
We repair all Rinnai models, including tankless gas/propane units, hybrid configurations, and commercial installations. We proudly service homes in Cumming, GA 30041 and surrounding Forsyth County communities.
Common warning signs include inconsistent hot water, error codes on the unit's display, leaks or pooling water, unusual noises (banging, rumbling, or hissing), pilot light issues, fluctuating water temperatures, and rising energy bills.
Yes. Emergency repairs are available in Cumming, GA 30041 with prompt response times for urgent situations.
Schedule a diagnostic visit. Our technician will identify the problem, outline necessary parts and labor, and provide an upfront written estimate before performing any repair.
Costs depend on the issue and parts required. Small repairs typically range from about $150 to $450; more complex repairs or rare parts may cost more. We provide transparent pricing before starting work.
We service residential homes and select commercial installations in Cumming, GA 30041 and nearby Forsyth County communities.
We use genuine Rinnai parts and back our work with warranties on both parts and labor. Warranty terms vary by model, parts used, and scope of service—ask our technician for specifics.
| Service Item | Description | Low | High |
|---|---|---|---|
| Service call / diagnostic fee | Initial visit to diagnose the issue; may be waived if repair proceeds | $85 | $125 |
| Labor (per hour) | On-site repair labor; varies by complexity | $85 | $150 |
| Descale / flush (tankless system) | Descale and flush to remove mineral buildup | $150 | $350 |
| Thermocouple replacement | Thermocouple/sensor replacement | $120 | $250 |
| Igniter replacement | Igniter or spark electrode replacement | $150 | $300 |
| Gas valve replacement | Gas control valve replacement | $300 | $700 |
| Pressure relief valve replacement | Relief valve replacement and testing | $120 | $240 |
| Temperature/flow sensor replacement | Water sensor or flow switch replacement | $120 | $260 |
| Heat exchanger replacement | Replacement of heat exchanger (major repair) | $900 | $1,800 |
| Vent / flue repair or replacement | Venting repair or replacement services | $150 | $500 |
| Unit replacement (new system installed) | Rinnai unit replacement with installation | $2,000 | $4,500 |
| After-hours / emergency service | Urgent service outside normal hours | $75 | $200 |
(770) 215-0473
