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Climatemaster - Code 5 / LT2 Fault - Cooling
ClimateMaster Heat Pump: Cooling Re: Code 5 / LT2 Fault Code 5 = Low Air Coil Temperature (FP2) The FP2 thermistor temperature must be below the selected low temperature limit setting (30 deg. unclipped) for 30 continuous seconds during a compressor run cycle to be recognized as a FP2...
05 May, 2022 Comments: 0
Climatemaster - Code 3 / Loss of Charge
Climatemaster Geothermal: Heating / Cooling Re: Code 3 / Loss of Charge Code 3 = Low Pressure Fault The low pressure switch must be open and remain open for 30 continuous seconds during an “on” cycle to be recognized as a low pressure fault. If the low pressure switch is open for 30...
22 Apr, 2022 Comments: 0
TM9Y - Flashing Code 9
York Gas Furnace: TM9Y Re: No Heat or Cool - Flashing Code 9 Code 9 = Indicates reversed line voltage polarity, reversed low voltage wiring, or Grounding problem Qty Possible Causes: 1 Loose Ground Missing Ground Reversed Line Voltage ("Hot" on white) ...
20 Apr, 2022 Comments: 0
TM9T - Flashing Code 9
York Gas Furnace: TM9T Re: No Heat or Cool - Flashing Code 9 Code 9 = Indicates reversed line voltage polarity, reversed low voltage wiring, or Grounding problem Qty Possible Causes: 1 Loose Ground Missing Ground Reversed Line Voltage ("Hot" on white) ...
20 Apr, 2022 Comments: 0
TM9Y Diagnostic Codes / Fault Codes
York Gas Furnaces: TM9Y Re: Diagnostic Codes / Fault Codes These York gas furnaces have a control board inside the furnace blower compartment that will flash a diagnostic code that shows the operating status of the furnace. Diagnostic Codes: Slow Green Normal Operation - no...
20 Apr, 2022 Comments: 0
TM9T Diagnostic Codes / Fault Codes
York Gas Furnaces: TM9T Re: Diagnostic Codes / Fault Codes These York gas furnaces have a control board inside the furnace blower compartment that will flash a diagnostic code that shows the operating status of the furnace. Diagnostic Codes: Slow Green Normal Operation - no...
20 Apr, 2022 Comments: 0
YZF - High Discharge Temperature (Heating)
York Heat Pump: YZF Re: High Discharge Temperature Fault (Heating) A High Temperature Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = 5 Flashes Red = On X/L Output 2 Flashes at Thermostat = Soft Lockout Locked-out two times in 6...
21 Mar, 2022 Comments: 0
TM9X/TM9E - Flashing Code 7
York Gas Furnace: TM9X/TM9E Re: Flashing Code 7 Code 7 = Failure to Sense Flame (3 Failed Ignition Attempts) Qty Possible Causes: Dirty Flame Sensor 1 Bad Glow Plug 1 Clogged Burners 1 No or Low Gas Pressure 1 Bad Gas Valve Bad...
08 Mar, 2022 Comments: 0
GSZ14 - Defrost Problem, Outdoor Coil Frozen
Goodman Heat Pump: GSZ14 Re: Defrost Problem, Outdoor Coil Frozen The Goodman GSZ14 Heat Pump uses a Time & Temperature Defrost Board. ► There are two different defrost boards used on these models. PCBDM101 = Simple Time & Temperature Defrost Board PCBDM133S = Advanced Time...
25 Feb, 2022 Comments: 0
Configure 2 Heat / 1 Cool Add-On Heat Pump
Honeywell Thermostats: TH8320R & TH8321R Re: Configure the thermostat for Add-On Heat Pump Step 1: Go to "Installer Setup" From the HOME Screen press the MENU tab Scroll down and select "Installer Options" Enter the Factory Password Select "Installer Setup" Step 2: Enter Setup...
23 Feb, 2022 Comments: 0
Package Heat Pump - High Electric Bills
York Package Heat Pump: Heating Re: High Electric Bill When the customers reports an electric bill that is much higher than normally, that typically means that the auxiliary heaters are operating more than normal. ► The blower and auxiliary heaters are typically working normally or the...
22 Feb, 2022 Comments: 0
Yorkguard - Flashing Code 5
York Heat Pump: EFH Re: Flashing Code 5 Code 5 - Defrost Fault (Going into defrost too often). These units use a Yorkguard Demand Defrost control board. The board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. ► If the board...
11 Feb, 2022 Comments: 0
Fujitsu - Error A1
Fujitsu Mini-Split Re: Error A1 Error Code A1 = High Compressor Discharge Temperature Also indicated on the control board by 10 Green flashes and 1 Orange flash. Qty Possible Causes: 3 Low Refrigerant Charge Bad Sensor CHECKOUT: 1. Check Unit...
05 Feb, 2022 Comments: 0
TG9S/GY9S - Flashing Code 4
York Gas Furnace: TG9S/GY9S Re: Flashing Code 4 Code 4 = Limit switch open If the limit control opens, the burners will be de-energized and the air circulation and vent blower will be turned on until the limit closes. The diagnostic light code for this is four short flashes followed by a...
05 Feb, 2022 Comments: 0
PY3G Fault Codes
Payne Package Units: PY3G Re: Lockout Codes Red Light Description Off No Power or Faulty control On Power On - Normal Operation 2 Limit switch fault 3 Flame sense fault 4 (4) Consecutive limit switch faults 5 Ignition lockout fault ...
04 Feb, 2022 Comments: 0
TG9S/GY9S - Flashing Code 7
York Gas Furnace: TG9S/GY9S Re: No Heat - Flashing Code 7 Code 7 = Three consecutive failed ignition attempts (failed to sense flame). ► This is a "Soft-Lockout" which will automatically reset/retry after 1 hour. Qty Possible Causes: 8 Dirty Flame Sensor 2 Bad Glow...
03 Feb, 2022 Comments: 0
DNZ - Flashing Code 2
Package Unit: DNZ Re: Flashing Code 2 These units have one control board (EMCB) which controls all unit functions. ► Any heating diagnostics will be displayed on the EMCB. CODE 2 = Pressure switch "Open" with the inducer motor energized. Qty Possible Causes: 1 Bad Inducer...
26 Jan, 2022 Comments: 0
PCC/PUC - No Heat / Won't Come On
York Gas Furnaces: PCC/PUC Re: Furnace Won't Come On / No Heat This condition is generally reported two different ways by the customer: "The furnace won't do anything." - Indicating that there is no activity from the furnace on a call for heat. "The furnace makes a noise, but it never...
18 Jan, 2022 Comments: 0
GPG13 - Flashing Code 1
​Goodman Package Unit: GPG13 Re: Flashing Code 1 / Won't Ignite Code 1 = 3 Failed Ignition Attempts ► A Manual-Reset Auxiliary Limit and Roll-Out Limit are wired in series with the gas valve and will cause a Fault Code 1. Qty Possible Causes: Dirty Flame Sensor Bad...
18 Jan, 2022 Comments: 0
GPG13 - Flashing Code 3
Goodman Package Unit: GPG13 Re: Flashing Code 3 Code 3 = Pressure switch failed to open (stuck closed) The furnace pressure switch should only close when the inducer fan output is energized. If control board is not energizing the inducer fan output and the switch is closed, the board will...
18 Jan, 2022 Comments: 0
PHU - Flashing Code 2
Gas Furnace: PHU Re: Flashing Code 2 (Assuming original control board) Code 2 = Pressure switch stuck closed The furnace pressure switch should only close when the inducer fan output is energized. If control board is not energizing the inducer fan output and the switch is closed, the board...
12 Jan, 2022 Comments: 0
TG9S/GY9S - Flashing Code 3
York 90% Gas Furnace: TG9S Re: Flashing Code 3 Code 3 = Furnace Pressure Switch failed to close on a call for heat. ►The code description on the blower door says, "Vent or Termination Problem" which is a possible cause, but not the most likely. This gas furnace has two pressure switches: ...
12 Jan, 2022 Comments: 0
P3UR - Flashing Code 2
York Gas Furnace: P3UR / P3DH Re: Flashing Code 2 Code 2 = Pressure switch stuck closed The furnace pressure switch should only close when the inducer fan output is energized. If control board is not energizing the inducer fan output and the pressure switch circuit is closed, the board will...
10 Jan, 2022 Comments: 0
YHE/YHG - Code 5 - Low Pressure - Heating
York Heat Pump: YHE / YHG Re: Low Suction Pressure - Code 5 (Heating) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) Qty Possible Causes: 1 Low Refrigerant Charge 1 Bad Expansion O/D Valve Bad Pressure Switch Not Defrosting CHECKOUT: ...
29 Dec, 2021 Comments: 0
YHE/YHG - Code 5 - Low Pressure - Cooling
York Heat Pump: YHE / YHG Re: Low Suction Pressure - Code 5 (Cooling) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) The heat pump compressor and condenser fan operate normally, but the system runs with a lower-than-normal suction pressure. Customer typically reports low or no...
29 Dec, 2021 Comments: 0