TXV Operation and Performance in Residential Air Conditioner and Heat Pump Systems
Type: Service Alert
Equipment: Air ConditionerHeat Pump
Recall or Alert Date: 04-23-2015
Serial Number: C-15-03
Brands Affected: Lennox
Reports from the field and testing in our lab indicate that in some cases, systems with thermal expansion valves may exhibit
reduced capacity and low suction pressure, resulting in reduced and/or lack of cooling.
Lennox has continued its diligence in working with our suppliers, testing laboratories and manufacturing locations to determine
the root cause of the TXV issue described above and in the previous service and application notifications; C-14-05 - Potential
Contaminants Affecting TXV Operation and Performance in Residential Air Conditioner and Heat Pump Systems and C-14-06
- Update on TXV Operation and Performance in Residential Air Conditioner and Heat Pump Systems.
Air Conditioning and Heat Pump systems using a thermal expansion valve (often abbreviated as TEV, TXV, or TX valve)
coupled with Copeland compressors with compressor serial number range of 13K through 14H. An example of the compressor
serial number is 14HXXXXXX where the first two-digits are the year and the next letter is the month indicating the year and
month of production.