Technician's Checklist

Below is a checklist of items our technicians check each time they visit.

Items in blue and underlined indicate a hyperlink which will take you to an article with more information about this subject.

• Checked all filters – Filter qty. ____ Filter Size 1___________   Filter Size 2__________      Filter Size 3 _______ ( Type_________)
• Visual inspection of indoor registers, dirty, or, any complaints of hot or cold spots from home
• Central Air Purification,  Is System Protected With UVC Technology?  Yes/ Or if no Why _________Manuf. ________Model  
• Visual,  Return Air Grill, or door test for duct leaks – ducts sealed, insulation taped and in good shape
• Air handler electrical connections tight and clean_____________
• Blower motor sealed, or was lube performed ___________________________________
• Blower wheel clean and tight __________________________
• Any evidence of contaminants on evaporator or in air handler ____________________________
• Condensate Line flushed and draining ____________________________  q P Trap installed properly ____ Is it primed Y/N
• Condensate Algaecide pills added to drain pan _____________________  q Safety Switch in pan? _________________
• Any sounds of vibration or air leaking _________________________________________
• Thermostat: Digital or Manual? ______________________________________________ STICKER ON T-STAT.
• Is it level, secure, and batteries changed, this year? ______________________________
• Any sounds or symptoms before you touch customers unit? _________________________________
• Amperage draw of electric heat kit                            Name Plate ____ Actual ____ KW__________
• FLA on blower motor   Name Plate ____ Actual ____
• FLA on inducer motor                                                 Name Plate ____ Actual ____
• Visual inspection of Burners______________ Heat Exchanger__________________ Combustion air motor ___________
• Carbon Monoxide Levels.  ______________________________
• Gas pressures Nat – (Max – 10”WC   Min-4.5”WC)    Incoming ____ Outgoing(3.5”WC/1.5”WC)    1st  Stg ____2nd Stg ____

Gas pressures  LP – (Max – 14”WC   Min-11.5”WC)  Incoming ____ Outgoing(10.5”WC/7.5”WC)  1st  Stg ____2nd Stg ____

With system stabilized and turned down low enough to not satisfy the thermostat, check the following:

• Delta T more than 2-3 degrees between rooms one room hotter or cooler________________________
• Supply temp ____ Return Temp ____ Difference ____ 
• Indoor Ambient ____ Indoor R/H ____ Indoor WET bulb ____ Humidification or Dehumidification needed? ________
• Checking charge in heat or cool? (Circle One)
• LLP ____  PTR ____  - LL Temp. ____ = Sub cooling ____     Required _____________ (HOT GAS TEMP____)
• Outdoor Dry Bulb ____   Indoor DB  ________   Indoor WB ________
• SLP ____  SL Temp ____  -SL  PTR ____ = Super heat ____   Required _____________
• Line voltage  ________ 
• Blower motor CEMF ______
• Compressor CEMF ____
• Condenser fan motor CEMF ____
• LRA of compressor - Would a Hard start be helpful?        Name Plate ____ Actual ____
• RLA of compressor                                           Name Plate ____ Actual ____
• FLA of fan motor                                                        Name Plate ____ Actual ____
• Check contactor condition __________________________________________________
• All electrical connections tight and clean? _____________________________________
• Is a factory time delay in use? ________________

In Shut down Mode

• Blower motor Capacitor MFD Name Plate ____ Actual ____ %
• Condenser fan cap. Name Plate ____ Actual ____ % ____, & Compressor Cap. Name Plate_____ Actual_____ %______
• Megohmeter readings on compressor ______, condenser fan motor _____, and PSC type blower motor _____ 
• Is condenser free of leaves, dirt or debris? Course of action taken_____________________
• Accumulator rusty/leaking    yes / no
• Circle  one for each, does unit have txv on evaporator Yes / No, and On condenser Yes / No
• Condition of condenser coil ________________________
• Fan Blade condition ______________________________
• Any evidence of Leaks ____________________________
• Any rust ________________________________________
• Clean exterior of air handler  ____________________________________