Diagnosed boiler system experiencing insufficient circulation due to air-lock condition. Removed and replaced a section of 1" copper piping as requested by homeowner. Performed system purge to eliminate air entrapment, thawed a blocked baseboard loop restricting flow, and restored normal circulation. Established proper water pressure at 20 psi, verified burner operation and gas pressure. System returned to normal operation with supply and return lines heating correctly. Note: Third zone remains intentionally shut as homeowners are aware and currently remodeling that area.
Responded to callback for no heat upstairs. Identified air lock in the system and resolved by bleeding significant air from purge valves where lines ascend to upper floor. Found and closed an incorrectly opened bypass valve which restored proper flow. System currently operational but noted several design issues including incorrectly piped expansion tank and questionable piping configuration. Recommended installation of conventional bladder tank with air scoop, auto fill, repipe on boiler return, and addition of glycol due to pipes running along exterior walls in this historic structure.
Diagnosed non-operational humidifier on previously installed HVAC system. Verified 24V power supply to solenoid using Fluke 365 True RMS Clamp Meter and confirmed solenoid resistance at 35.5 ohms. Observed intermittent clicking of faulty solenoid that remained in closed position despite proper voltage. Replaced defective solenoid to restore proper humidifier function.
Performed tune-up maintenance on 21-year-old Carrier 80% furnace. Discovered dirty blower wheel, oil leaking from blower motor, and heat exchanger in deteriorated condition with potential crack that was documented with photos and discussed with customer. Cleaned blower motor and wheel, and recommended comfort advisor consultation regarding the aging system components.
Responded to service call for a boiler with no heat in the upstairs portion of the house. Diagnosed low water level in system and air in upstairs radiators. Manually added water to the boiler using bypass since the auto-fill feature is non-functional, bled air from radiators, and restored system to proper operating temperature. All heating functions now operating correctly.
Responded to service call for inoperative RTU that was installed approximately 3 years ago. Unit was attempting to fire but failing, displaying 9 flashes followed by ignition lockout code. Diagnostic testing revealed limit code error. All limits were tested and confirmed operational. Voltage measurement showed proper 27V at limit terminal, but board was not recognizing input signal. Control board was replaced to resolve the issue.
Diagnosed furnace with flashing service light indicating switch failure. Upon inspection, discovered failed gas valve as root cause of no heat condition. Removed defective valve, installed new replacement gas valve, and calibrated proper gas pressures. Verified system operation with temperature reading of 118.7°F. System is now heating properly and functioning as designed.
Performed annual furnace tune-up on 4-year-old unit. Conducted comprehensive diagnostic testing with Testo 310 II analyzer confirming optimal performance (97.3% efficiency, CO levels within safe parameters at 14 ppm). Replaced dirty air filter to maintain proper airflow and system efficiency.
Completed installation of customer-supplied pedestal sink and toilet in bathroom, which included properly connecting water supply lines, drain pipes, and ensuring secure fixture mounting. Installation required accessing ceiling plumbing in utility area to properly route PVC drainage and copper water supply lines for the new bathroom fixtures.
Responded to service call for non-functioning furnace. Upon arrival, system was operational after customer reset. Performed diagnostic check and furnace tune-up, identifying and cleaning heavily corroded flame sensor which likely caused previous non-start condition. Inspection revealed small crack in heat exchanger near crimp. Advised homeowner replacement is recommended due to crack and unit's 25-year age, though furnace is currently functioning properly.
Installed customer-supplied toilet and pedestal sink. Properly connected fixtures to existing plumbing system and verified proper function. Work included setting fixtures in position, connecting water supply lines, and ensuring no leaks.
Performed furnace tune-up maintenance on 24-year-old system that was running noisily before winter season. Cleaned flame sensor, checked air filter, and inspected heat exchanger where two significant cracks were discovered in one of the cells. Informed homeowner of findings, who acknowledged the issue and expressed interest in system replacement quotes as the equipment has reached end of service life.
Diagnosed and repaired water leak behind shower that had been penetrating through wall near tub spout. Replaced shower valve to resolve the issue, returning bathroom plumbing to proper working condition.
Responded to service call for non-flushing toilet. Upon inspection, discovered corroded internal components including a damaged flush valve assembly. Replaced faulty fill valve and flapper to restore proper toilet function.
Diagnosed noisy furnace caused by faulty exhaust system; replaced exhaust components and secured proper venting. Performed comprehensive maintenance including cleaning flame sensor and verifying gas pressure. System is now operating correctly with clean combustion and no loud noises.
