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    Same-Day ServiceEPA 608 Certified

    Professional Boiler Diagnostic Service

    Expert diagnosis for all boiler problems. $199 flat fee credited toward repairs.

    5(88 reviews)
    90-Minute Response
    Residential Diagnostic
    $199

    Diagnostic fee credited toward any repairs

    Fee Credited to Repair!

    If you proceed with repair, the $199 diagnostic fee is applied toward your repair cost — making the diagnostic effectively $0.

    18-point inspection
    Error code diagnosis
    Safety checks included
    Written repair options
    No obligation to repair
    Schedule Diagnostic

    Commercial diagnostic: $299 (credited toward repair)

    EPA 608 Certified
    5-Star Rated
    Same-Day Diagnostic

    What a boiler diagnostic costs

    $0 — Waived$199

    Diagnostic fee waived for Home+ Comfort members — $299/year

    Home+ Comfort starts at $299/year. Toggle to compare.

    Join Home+ Comfort

    What's Your Boiler Doing?

    Select your symptom to learn more about possible causes and solutions:

    What Our 19-Point Boiler Diagnostic Includes

    Customer symptom interview and history documentation
    Error code reading and interpretation
    Burner inspection and cleaning assessment
    Flame analysis (color, pattern, stability)
    Ignition system testing (pilot/electronic)
    Gas or oil supply verification
    Combustion chamber inspection
    Heat exchanger condition assessment
    Circulator pump operation test
    System pressure gauge reading
    Expansion tank inspection
    Zone valve testing
    Pressure relief valve test
    Low water cutoff verification
    High limit control test
    Carbon monoxide detection
    Control board and wiring inspection
    Flue pipe and venting inspection
    Written diagnosis with repair options and pricing

    When to Call for Professional Diagnostics

    Safety Triggers

    • Gas or oil smell near boiler
    • Carbon monoxide alarm activation
    • Visible smoke or burning odor
    • Water leaking from boiler
    • Boiler overheating

    Complexity Triggers

    • Error codes on display
    • Electrical issues or tripped breakers
    • Ignition or pilot light problems
    • Pressure or circulation issues
    • Zone valve malfunctions

    Cost Triggers

    • Multiple DIY attempts failed
    • Problem keeps recurring
    • Energy bills suddenly increased
    • System over 15 years old
    • Previous repair attempts failed

    DIY vs Professional Diagnostic

    DIY Troubleshooting

    Pros:

    • Free
    • Learn about your system

    Cons:

    • Limited diagnostic tools
    • Risk of misdiagnosis
    • Safety hazards with gas/oil/electrical
    • May void warranty

    Professional Diagnostic

    Pros:

    • Accurate diagnosis
    • Safety checks included
    • Written repair options
    • Fee credited to repairs

    Cons:

    • $199 fee (but credited to repairs)

    Related Resources

    Frequently Asked Questions

    Frequently Asked Questions

    Get answers to common questions about our services

    Boiler Brands We Service

    Experienced technicians on all major manufacturers

    Popular
    Weil-McLain
    Popular
    Burnham
    Popular
    Navien
    Bosch
    Lennox
    Slant/Fin
    Triangle Tube
    Lochinvar
    Buderus
    Rinnai
    Crown Boiler
    Viessmann

    Don't see your brand? We service all boiler makes and models. Call to confirm

    Ready to Get Started?

    Don't let a boiler problem leave you without heat. Our $199 diagnostic fee is credited toward repairs—schedule your same-day service now.

    Current Offers

    Deals & Savings

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    LIMITED TIME FINANCING
    0% FOR 25 MONTHS

    Financing On New System Installs

    Limited-time 0% interest for 25 months on qualifying installations of $2,500+. No money down, no prepayment penalty. Subject to credit approval.

    Exp. Limited Time
    HEATING SPECIAL
    $500 OFF

    Furnace Installation

    Save $500 on a new high-efficiency furnace installation with our 10-year labor warranty.

    Exp. December 31, 2026