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Boiler Repairs & Replacement
BY TOP CLEVELAND’S HVAC SPECIALIST
From minor repairs to full system replacement, Global HVAC has your boiler needs covered. Our skilled technicians provide fast, reliable service with upfront, honest pricing. Plus, there’s no service call fee if you move forward with our recommended repair.
Step 1 is getting one of our certified techs to your home or business to diagnose your boiler. Our trucks are fully stocked to handle most repairs on-site. Call us 24/7 at (216) 797-1230.
All repairs come with a 1-year guarantee and our 100% satisfaction guarantee.
CERTIFIED DEALERS & TECHNICIANS
Our Boilers Are
What Is a Boiler?
A boiler is a heating system that warms your home or business using water or steam. Unlike furnaces that blow warm air, boilers provide consistent heat through radiators, baseboards, or radiant floor systems.
High-efficiency boilers from Navien help reduce energy costs while delivering reliable heat year-round.
Watch the video here to learn more!
9 Common Boiler Problems and How to Fix Them
Boilers keep your home warm and comfortable year-round, but like any mechanical system, they can develop issues over time. When a boiler stops working, it can quickly become a major inconvenience—especially during cold months. At Global HVAC, we’re here to help you stay cozy and avoid unexpected breakdowns. Below are common boiler problems and simple troubleshooting tips before calling a professional.
Common Boiler Problems
1. No Heat or Hot Water
Boilers may stop producing heat due to thermostat issues, low water pressure, frozen condensate pipes, airlocks, or a faulty pump.
Quick Fixes:
- Check thermostat settings
- Confirm the boiler has power
- Bleed radiators to release trapped air
If these steps don’t work, call a certified boiler technician.
2. Leaking Boiler
Leaks can form around valves, pipes, or the boiler itself.
Quick Fixes:
- Turn off the boiler and water supply
- Inspect pipes and valves for damage
- Call a professional to repair or replace the faulty part
3. Unusual Noises
Banging, gurgling, or whistling sounds usually indicate trapped air, loose components, or buildup inside the system.
Quick Fixes:
- Bleed radiators
- Check for loose or damaged parts
- Consider a descaling service for the heat exchanger
4. Frozen Condensate Pipe
Cold weather can freeze the condensate pipe, causing the boiler to shut down.
Quick Fixes:
- Thaw the pipe using warm water or a hot water bottle
- Insulate the pipe to prevent future freezing
5. Radiators Not Heating
Radiators may stay cold due to trapped air, sludge buildup, or a malfunctioning heat pump.
Quick Fixes:
- Bleed radiators
- Flush system if debris is present
- Check the heat pump operation
6. Boiler Keeps Turning Off
A boiler that shuts off prematurely is often caused by thermostat errors or obstructions around the unit.
Quick Fixes:
- Adjust thermostat settings and replace batteries if needed
- Remove obstructions around the boiler
7. Pilot Light Problems
Gas boilers may stop producing heat if the pilot light goes out.
Quick Fixes:
- Turn off gas and clean the pilot assembly
- Relight according to manufacturer instructions
- Call a technician if the problem persists
8. Boiler Not Responding to Thermostat
If your boiler ignores thermostat commands, the sensor may be faulty, dirty, or need new batteries.
Quick Fixes:
- Replace thermostat batteries
- Clean the thermostat
- Contact a professional if it still doesn’t respond
9. Uneven Heating
Cold spots in your home can be caused by low water levels, blocked radiators, or poor insulation.
Quick Fixes:
- Check and adjust water levels
- Remove obstructions
- Consider adding insulation if the boiler is in a cold area
Need Boiler Repair?
If you’ve tried these troubleshooting steps and your boiler still isn’t working, Global HVAC’s certified technicians in Cleveland, OH and surrounding areas are ready to help. We handle repairs, replacements, and maintenance for all boiler models.
NFB-H (Residential Model)
FEATURES
- Patented stainless steel fire tube heat exchanger—reduces high stress point welds
- Advanced user interface with intuitive text display and Quick Dial Wheel for easy navigation
- Smart controls with Setup Wizard to simplify boiler start up
- Built-in 3 zone pumps or 3 zone valves powered connections
- Optional NaviLink Wi-Fi remote control
- Common venting up to 8 boilers
- Cascading up to 16 boilers
- Up to 15:1 turndown ratio
- AFUE 95.0%—Energy Star certified
- Compact, light weight, wall hung design saves space over traditional floor standing boilers
NHB-H (Residential Model)
- Condensing Heating Boiler
- Patented Dual Stainless Steel Heat Exchangers
- Industry-Leading AFUE 95% – Energy Star certified for maximum efficiency
- Up to 15:1 Turndown Ratio – Minimizes short cycling and adapts to changing heating demands
- Advanced User Interface
- Built-In Smart Controls
- Integrated Pump/Zone Control
- Optional NaviLink Wi-Fi Remote Control
- NHB-H Stainless Steel Manifold Kit
- Cascading Capability
What Is a Combi Boiler?
A combi boiler (short for combination boiler) is a type of heating system that provides both central heating and hot water from one compact unit.
How it works:
It heats water on demand, so there’s no hot water tank or cylinder.
When you turn on a hot water tap or shower, the boiler instantly heats the water.
The same unit also supplies heat to radiators or underfloor heating.
Key benefits of a Combi Boiler:
- Space-saving – no separate water tank or cylinder
- Energy efficient – only heats water when needed
- Lower installation cost – fewer components
- Unlimited hot water (as long as demand isn’t simultaneous in many places)
Our Combi Boilers Are
NCB-H Condensing Combi-Boiler
FEATURES
- Highest DHW maximum BTU’s in residential combi-boilers - up to 210,000 per hour
- Highest DHW flow rate @ 70°F rise - up to 5.4 GPM
- Highest number of BTU sizes for the North American residential combi-boiler market
- Highest residential combi DHW TDR - 15:1 for all models
- Highest residential combi heating TDR - up to 11:1
- Built-in zone controls for up to three zone valves or zone pumps
- Cascade capable with up to 15 NPE tankless water heaters for expanded DHW flow
- High altitude certification - up to 10,100 feet (NG or LP)
- Lowest minimum fire BTU for residential combi-boilers... as low as 10,700
NHB-H Condensing Combi-Boiler
- Highest DHW maximum BTU’s in residential combi-boilers - up to 210,000 per hour *
- Highest DHW flow rate @ 70°F rise - up to 5.4 GPM
- Highest residential combi DHW TDR - 15:1 for all models
- Highest residential combi heating TDR -up to 15:1
- Built-in zone controls for up to three zone valves or zone pumps
- Cascade capable with up to 15 NPE tankless water heaters for expanded DHW flow
- High altitude certification - up to 10,100 feet (NG or LP)
- Lowest minimum fire BTU/H (13,300) for whole house** residential combi-boilers.
*Based on NFC-250/200H.
**Whole house refers to combi-boilers that offer at least 150,000 BTU/H for DHW.
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