AC, Furnace & Plumbing Services in St. Charles, MO

Responded to a cooling system failure on a Lennox unit. Diagnosed a faulty low pressure switch preventing the system from operating properly. Removed the defective low pressure switch and installed a replacement screw-in style low pressure switch sourced from Johnstone Supply. Tested system operation and verified proper cooling functionality. Discarded the failed component and cleared the service call.

Responded to no cooling call on 10+ year old air conditioning system. Upon arrival, found thermostat set to cool mode at 78°F but unit producing only ambient air with no temperature drop. Performed diagnostic evaluation of system components including thermostat functionality and electrical connections at air handler terminal block. Inspected wiring integrity and terminal connections, noting age-related deterioration of equipment. Identified root cause of cooling failure and completed necessary repairs to restore proper system operation. Unit tested and verified cooling cycle functioning correctly upon departure.

Completed comprehensive tune-up and maintenance service on residential HVAC system per Home Depot work order F58176315. Performed system diagnostics and operational testing, confirming unit functionality with digital measurement instrumentation. Inspected and verified proper air filter installation, noting pleated media filter properly seated in overhead air handler mounting frame with adequate insulation integrity in attic-mounted equipment area.

Completed annual cooling maintenance and tune-up on HVAC system. Performed comprehensive system diagnostics using digital multimeter and clamp meter to verify electrical readings, measured supply air temperature at 172.9°F, and confirmed amperage draw at 5.19 amps. All measurements within manufacturer specifications and system operating properly with no deficiencies noted.

Completed cooling maintenance tune-up on residential HVAC system. Inspected control board, blower motor assembly, and evaporator coil; verified all electronic components, wiring connections, and heat exchanger fins were clean and functioning properly. System operational with no deficiencies noted at time of service.

Completed comprehensive cooling tune-up on 4-year-old ground-level AC unit during morning service window. Performed full system inspection including control board evaluation, thermostat functionality verification showing system idle at 74°F setpoint, and electrical connections assessment. All components found operating within normal parameters with no deficiencies noted; system ready for cooling season operation.

Installed replacement condenser coil on HVAC system under warranty coverage. Removed and disposed of failed original coil, then installed new unit supplied by Lennox. System tested and verified operational for both heating and cooling functions upon completion.

Responded to service call regarding outdoor condenser coil positioning concern. Upon inspection, verified that the unit's coil configuration and 90-degree angle orientation is factory standard design for this model. Condenser unit operating as designed with proper refrigerant line connections and no issues identified. Documented unit condition with photos for service records.

Responded to thermostat error code indicating low secondary 24 VAC voltage on hallway unit U10. Performed diagnostic inspection of HVAC system, checking electrical connections, transformer output, and control circuit voltage levels in confined attic space. Inspected outdoor condenser unit, noting accumulated dirt and debris on coil fins that could impact system efficiency and airflow, documenting conditions with photographs for service records.

Completed comprehensive electrical inspection of residential property. Evaluated exposed basement ceiling infrastructure including lighting fixtures, electrical panel with dual-row circuit breaker configuration, and associated wiring systems. Documented condition of electrical panel showing multiple branch circuits with red, black, and white conductors, examined recessed LED lighting installation with visible mounting hardware and support conduit, and assessed overall electrical system integrity in unfinished utility space. Photographed findings for record-keeping purposes, noting exposed insulation material near electrical components and standard residential electrical installation configuration.

Responded to no cooling complaint on 3-year-old residential air conditioning system. Upon inspection, found outdoor condenser coil heavily contaminated with dirt, dust, and debris accumulation restricting airflow and preventing proper heat transfer. Thoroughly cleaned condenser coil to restore system efficiency and airflow. Unit tested and confirmed operational with proper cooling restored throughout home.

Performed diagnostic evaluation on Lennox heat pump system experiencing performance concerns. Conducted initial system assessment and inspection of outdoor condenser unit and control board components. Unable to complete full refrigerant charge verification and system performance testing due to ambient temperature conditions being insufficient for accurate heat pump operation analysis. Documented equipment condition and control board configuration. Follow-up visit required during warmer weather to properly assess system pressures, verify refrigerant charge levels, and determine if low refrigerant or restriction in refrigerant circuit is causing performance issues.

Completed blower motor replacement on American Standard furnace system. Installed new motor, tested system operation, and verified proper heating and cooling functionality. Removed and disposed of failed blower motor component per standard protocol.

Completed standard U10 cooling tune-up on residential split system air conditioning unit under ten years old. Performed comprehensive system diagnostics including capacitor testing with digital multimeter and visual inspection of outdoor condenser unit components. All measurements within manufacturer specifications; system operating properly with no deficiencies noted.

Responded to service call for one-year-old mini split system blowing warm air instead of cooling. Upon inspection, discovered severe contamination and corrosion within the indoor unit, including extensive dark staining, moisture damage, and deterioration of internal components. Found corroded copper piping connections and valve assembly with significant oxidation around fittings, likely related to previous lineset leak repair completed one month after initial installation. Documented conditions with photographic evidence showing compromised interior surfaces, accumulated debris, and hardware corrosion affecting system performance. Unit requires further evaluation to determine if contamination has damaged refrigerant circuit or if additional repairs beyond previous lineset work are necessary to restore proper cooling operation.

Replaced defective evaporator coil on Trane air handler system. Removed and properly disposed of failed coil assembly, installed new warranty replacement unit, and verified all refrigerant line connections were secure. System tested and confirmed operational with proper airflow restored.

Completed preventive maintenance tune-up on a residential cooling system over 10 years old located in the side yard. Performed comprehensive inspection of the air handler blower assembly, verified proper motor operation and electrical connections, and checked ductwork system for proper airflow and secure fastening. All components found operating within normal parameters with no immediate repairs required at this time.

Completed cooling maintenance tune-up on 9-year-old Trane air conditioning system. Performed standard diagnostic testing using digital multimeter to verify electrical components and capacitor readings, which measured at 0.60 MFD. Inspected air filtration system and confirmed filter requires replacement by customer as previously noted.

Responded to service call for 15-year-old Desert Aire AC system experiencing excessive noise and inadequate cooling, unable to maintain temperature below 79°F. Upon inspection of outdoor unit, identified compromised airflow through louvered vents and inspected refrigerant lines and internal components. Addressed mechanical issues affecting compressor operation and system efficiency, restored proper cooling capacity and reduced operational noise to normal levels.

Responded to report of scraping noise from condenser fan on residential split system unit located in side yard. Upon inspection, found condenser coil heavily soiled with dirt and debris accumulation affecting airflow and causing abnormal fan operation. Cleaned condenser coil, removed debris from fan assembly, and verified proper fan motor operation and blade clearance, eliminating the scraping noise.