64.4 16,600 Temperature °F Value in resistance 68 15,000 (1 0f 1) 78.8 11,900 71.6 14,000 82.4 10,850 75.2 12,900 86 9,800 89.6 9,100 68 15,000 71.6 14,000 E-32 refers to a short at the T2 return sensor: 75.2 12,900 Inspect connector at both the T2 sensor and 78.8 11,900 MCBA for loose, damaged or broken fittings 82.4 10,850 or connections. If damage is found replace any 86 9,800 damaged wiring, harness or component found 89.6 9,100 to be defective. 93.2 8,500 Inspect all T2 sensor connectors, wiring 96.8 7,900 harnesses and pins for any signs of 100.4 7,200 moisture or corrosion. 104 6,500 Replace all fittings or harnesses found 113 5,600 to have corrosion on them. Locate and correct the source of the moisture. Possible 122 4,600 causes, cross contamination from the 131 4,000 venting, condensate trap, 140 3,400 condensate collector, etc…. 158 2,300 If no corrosion or moisture is found on the 176 1,700 connector or T2 sensor, disconnect the Molex connector from the sensor. 194 1,300 Using a digital multimeter set it to read Ohms. Check the resistance value from the sensor. Match the value to the chart found on the next page based on the temperature the sensor is reading. If the meter reading shows “OL” or “Open” replace the T2 sensor. If the resistance value is much higher or lower than the value listed, replace the T2 sensor. Check the source of the end switch connected to terminals 22 and 23, this should be a “dry contact” with no voltage from the end switch present. Disconnect the wires from terminals 22 and 23, check for any voltage on the wires that were removed. If voltage is found on these wires, repair the issue by reconfiguring the wiring or adding a
64.4 16,600 68 15,000 71.6 14,000 75.2 12,900 Temperature °F Value in resistance 78.8 11,900 82.4 10,850 86 9,800 89.6 9,100 68 15,000 71.6 14,000 75.2 12,900 78.8 11,900 82.4 10,850 86 9,800 89.6 9,100 93.2 8,500 96.8 7,900 100.4 7,200 104 6,500 113 5,600 122 4,600 131 4,000 140 3,400 158 2,300 176 1,700 194 1,300 (1 0f 1) E-32 refers to a short at the T2 return sensor: Inspect connector at both the T2 sensor and MCBA for loose, damaged or broken fittings or connections. If damage is found replace any damaged wiring, harness or component found to be defective. Inspect all T2 sensor connectors, wiring harnesses and pins for any signs of moisture or corrosion. Replace all fittings or harnesses found to have corrosion on them. Locate and correct the source of the moisture. Possible causes, cross contamination from the venting, condensate trap, condensate collector, etc…. If no corrosion or moisture is found on the connector or T2 sensor, disconnect the Molex connector from the sensor. Using a digital multimeter set it to read Ohms. Check the resistance value from the sensor. Match the value to the chart found on the next page based on the temperature the sensor is reading. If the meter reading shows “OL” or “Open” replace the T2 sensor. If the resistance value is much higher or lower than the value listed, replace the T2 sensor. Check the source of the end switch connected to terminals 22 and 23, this should be a “dry contact” with no voltage from the end switch present. Disconnect the wires from terminals 22 and 23, check for any voltage on the wires that were removed. If voltage is found on these wires, repair the issue by reconfiguring the wiring or adding a
2016%20Boiler%20Knowledge%20Base%2004152016GW.docx