AIR HANDLER / BLOWER UNITS ADDING A/C: RETROFIT SIZING

BLOWER FAN CONTINUOUS OPERATION BLOWER FAN OPERATION & TESTING BLOWER LEAKS, RUST & MOLD COOLING COIL or EVAPORATOR COIL DIRTY A/C BLOWERS

Carrier 38TKB A/C, 12 yr old, dual speed blower, cools well most of time but when temp is above 95, blower seems stuck on low speed with reduced cooling capacity. Checked yearly-refrigeration good, appears to be working as expected, but no solution for these sometimes lack of cooling which results in rise in temp of 5-6 degrees before returning to normal cooling. Do you have answer for this?

(June 18, 2012) DanJoeFriedman (mod) said:

Jerry, check out CAPACITORS for HARD STARTING MOTORS (links at page left) and you'll see that we include the testing and replacement of start/run capacitors. You might actually see a bad capacitor - if it or its wires look burned or if the unit has swollen or cracked. But more often the symptom is that the electric motor the cap is supposed to support is having trouble starting or wont' start or won't run.

Ads by Google Air Conditioners Air Handler AC Air Conditioning AC Repair Services

Thanks to Mark Cramer, Tampa Florida, for assistance in technical review of the "Critical Defects" section and for the photograph of the deteriorating gray Owens Corning flex duct in a hot attic. Mr. Cramer is a Florida home inspector and home inspection educator.

Thanks to Jon Bolton, an ASHI, FABI, and otherwise certified Florida home inspector who provided photos of failing Goodman gray flex duct in a hot attic.

Carson Dunlop, Associates, Toronto, have provided us with (and we recommend) Carson Dunlop Weldon & Associates' Technical Reference Guide to manufacturer's model and serial number information for heating and cooling equipment ($69.00 U.S.).

Wikipedia provided background information about the definition of HEPA and airborne particle interception. [5] US EPA - Mold Remediation in Schools and Commercial Building [ copy on file as

/sickhouse/EPA_Mold_Remediation_in_Schools.pdf ] - US EPA

Modern Refrigeration and Air Conditioning, A. D. Althouse, C.H. Turnquist, A. Bracciano, Goodheart-Willcox Co., 1982

Principles of Refrigeration, R. Warren Marsh, C. Thomas Olivo, Delmar Publishers, 1979

"Air Conditioning & Refrigeration I & II", BOCES Education, Warren Hilliard (instructor), Poughkeepsie, New York, May - July 1982, [classroom notes from air conditioning and refrigeration maintenance and repair course

attended by the website author]

Refrigeration and Air Conditioning Technology, 5th Ed., William C. Whitman, William M. Johnson, John Tomczyk, Cengage Learning, 2005, ISBN 1401837654, 9781401837655 1324 pages

Carson Dunlop, Associates, Toronto, have provided us with (and we recommend) Carson Dunlop Weldon & Associates' Technical Reference Guide to manufacturer's model and serial number information for heating and cooling equipment ($69.00 U.S.).

Air Conditioning SEER - New DOE Air Conditioner and Heat Pump Efficiency Standard

How to diagnose and fix an air conditioning system that is not

working

Since the failure of an air conditioner to turn on, loss of air conditioner cooling capacity, reduced air conditioning output temperatures, loss of cool air supply, or even loss of air flow entirely can be due to a variety of problems with one or more components of an air conditioner or air conditioning system, after reviewing the lost air conditioner cooling diagnosis procedures described in this article, be sure to also review the diagnostic procedures at each of the individual air conditioning diagnosis and repair major topics listed just below. To return to our air conditioning and refrigeration home page go to AIR CONDITIONING & HEAT PUMP SYSTEMS.

If your air conditioning or heat pump system has lost its cooling capacity or won't start select one or more of the diagnostic articles listed below.

A/C - HEAT PUMP CONTROLS & SWITCHES: air conditioner controls and switches - begin here if your A/C won't start. Here's an important tip: most refrigeration problems, in air conditioners, refrigerators, or freezers, are electrical, not mechanical. In air conditioning school, we used to drive out and collect abandoned refrigerators that people were tossing out during our community's spring cleanup week. Taking these appliances back into the shop we found that almost always the problem that had caused the owner to dispose of their air conditioner or freezer was in an electrical connection or electrical control. So it's worth checking out switches and controls on an air

conditioner before replacing more costly components.

OPERATING DEFECTS: major air conditioning problem symptoms and how to get the air conditioning system working again,e.g. compressor or fan noises, failure to start, and inadequate cool air volume

LOST COOLING CAPACITY: what to do when not enough cool air comes out of the system

What to check first if there is no cool air or not enough cool air

Compressor failure diagnosis: basic checks of the air conditioner compressor

COMPRESSOR CONDENSER: problems with air conditioner compressor/condenser units

AIR HANDLER / BLOWER UNITS: problems with the air handler, air filters, and the cooling coil itself DUCT SYSTEM DEFECTS: problems with the air duct system, air filters, supply registers, return air registers A/C REFRIGERANT LEAK DETECTION: how to use a TIF5000 to detect air conditioning refrigerant gas leak

A/C DIAGNOSTIC FAQs: air conditioning system diagnostic FAQs: Q&A about air conditioner repair - a detailed air conditioning system diagnostic checklist

Books & Articles on Building & Environmental Inspection,

Testing, Diagnosis, & Repair

Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.

Complete List of Air Conditioning & Heat Pump Design, Inspection, Repair Books at the InspectAPedia Bookstore.

The Home Reference Book - the Encyclopedia of Homes, Carson, Dunlop & Associates Ltd., Toronto, Ontario, 25th Ed., 2012, $69.00 U.S., is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.

Or choose the The Home Reference eBook for using this reference on PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones

Note: InspectAPedia.com ® editor Daniel Friedman is a contributing author.

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