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Furnace deep clean and mechanical operation check

Furnace deep clean has to be done with a shop vac and a few brushes. If your service tech does not have these tools, find another company. The furnace gets deep cleaned first so we know it gets done right. If the service tech says I'm only allowed 1\2 hour to an hour to perform the service, find another company. We can not properly check a furnace that is dirty.

Clean fan motor, inducer motor (cleaning the inducer motor will help get the startup rattle out), clean entire inside of chassis, blow out debris from all tubing and hoses, clean flame sensor, clean inshot burners for proper ground, clean fresh air intake, blowout exhaust flu pipe with pressured air. Clean box that holds filter in place. 

Mechanical test voltage on inducer motor, gas valve, capacitor and whole house fan motor. Check inches of water column gas pressure on the gas valve ( improper setting of gas valve with either cause incomplete combustion which causes soot and cause the furnace to burn to hot and burn a whole the the tubular heat exchanger. 

Furnace clean and check will take 1 1\2  hours anything less is neglectful service by the HVAC company

Air conditioning deep clean & mechanical operation check

AC maintenance begins with identify refrigerant type used in the ac system for cooling. Check proper placement and installation of how equipment was installed.

Check evaporator, evaporator drain, evap housing and identify what metering device is being used to feed the evap coil refrigerant. options are "Piston " or "TXV".  

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Next the condenser and the evaporator coil coil get spraying with soap and fins and tubing are deep clean to help heat transfer from the home to the refrigerant in the copper tubing.

Now the system is put in run cycle and allowed to start its cooling process. As ac system is running with gauges, the refrigerant level temperature and pressure level are all examined for proper operation abilities. By what the gauges tell us will determine what if any solutions can be performed for optimal operation of the cooling and humidity control system. Ac system may be low on refrigerant and in this case the system would have to be recovered of existing refrigerant and a intensive leak check will have to be performed and repairs made to insure refrigerant does not leak out into the environment in the future.

Third is check all mechanical and electrical components for proper line in voltage, contactor is not burnt and refrigerant compressor motor is running at right 220 voltage and correct amp draw required on equipment nameplate located on the condenser.  

IAQ indoor air quality

IAQ will be maintenance of the ductwork and filter system carrying the air from your furnace and ac system to distribute climate control throughout the home and back to the system to continue the cycle. 

For optimal indoor air quality I recommend the thermostat fan setting be set to "ON" for a 24 hour a day run on low to allow hot and cold spots in the home to average out in temperature and constantly filter the moving air and control moisture in the system. 

Lets talk air filters. for every one inch of filter I give that a month of use time and changing schedule. For instance a 16 x 25 x 1 common filter  that is 1 inch thick last for 1 month. A 4 inch air filter will last 4 months. and 5 for 5 months. I recommend following this filter change and not let your filter change program go less that 4 changes a year. One inch filters will clog with debris and collapse in on itself allowing dust and debris into the supply side of the system. Four and five inch filters are changed every quarter and if allowed to only be changed once a year then the big 4 and 5 inch box filter will clog and cause your furnace to overheat do to improper airflow and cause the ac system to freeze up do also to improper air flow. Not passing  enough hot inside air over the evaporator coil to keep the coil defrosted and give cooling comfort to the home. 

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A common practice from most service providers will be to tell you as a convenience you only have to change your 4 or 5 inch whole home air filter once a year. Well when this advice is given your furnace usually overheats in the winter and shuts down and blows cold air on you. When you have the same company come out to provide service for the no heat call they find no problem with the function mechanically but find the furnace shut down do to high heat in the cabinet do to that very dirty clogged air filter. What happens next? The filter gets changed out of rotation and you just bought a second filter you were told only needed to be changed once an year. Second you paid for a useless service and repair change that could have been avoided if said filters were changed every quarter as your prevention program. I even seen service providers lie about this filter change practice and say it was a "dirty flame sensor" to cover and justify the nuisance service call.

And DAMN don't be out of town in the winter and the furnace shutoff do to a dirty filter, i.e.. busted water pipes from low indoor air temp. 

Next up in IAQ is leaking ductwork from the return air side and the supply air side.  

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