Question about Heating & Cooling
First off as silly as this may seem check the filter! A furnace usually has several speeds to the blower. Heat speed is factory set at low! I would also check to see if the squirrel cage has a lot of dirt in it, this could reduce airflow. Make sure you dont have boxes, couches, etc. blocking the return air vents. If you replaced the blower motor, Be darn certain it runs at the same rpm and horse power as the OEM motor did. Furnaces run on CFM or Cubic Feet Per Minute. If you run too much cfm your temp rise across the heat exchanger will be too great causing a low supply air temp! If too little cfm than your furnace may overheat causing it to trop on a high limit switch! There culd be any amount of problems with oyur system, call a certified tech to give it a once over it will save you a headache which is usually cheaper than the bill!
Posted on Jan 09, 2009
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Posted on Jan 02, 2017
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Dec 12, 2013 | Heating & Cooling
Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. Dirt affects all three basic components of your furnace, so cleaning is the most important part of regular maintenance. The three parts of the furnace should be cleaned: the filter system, the blower, and the motor.
The furnace filter should be replaced or cleaned at the beginning of the heating season and about once a month during periods of continuous use. To check the filter, take it out and hold it up to the light. If it looks clogged, replace it with a new filter of the same type and size regardless of the length of time it has been used.
Step 4: Clean blower assembly, belts and pulleys to blower, and motor housing. Cleaning blower is critical if furnace has a squirrel-cage fan, because openings in this type of blower often become clogged with dirt. To clean blower, remove panel that covers filter to gain access to blower or panel on front of furnace. This panel may be slip-fit on hooks or held by series of retaining screws. Access to inside of blower is usually gained by sliding out fan unit, which is held on track by screws.
If power cord to fan assembly is not long enough to permit fan unit to slide all the way out, disconnect cord. Mark wire connections first so you'll be able to reassemble unit correctly. With toothbrush, clean each fan blade and spaces between blades. Then, with vacuum cleaner hose, remove all dirt and debris loosened by brushing. Vacuum belts and pulleys. Wipe motor housing clean to prevent heat buildup in motor.
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