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TM9X/TM9E - Flashing Code 6
York Gas Furnace: TM9X / TM9E Re: Flashing Code 6 Code 6 = Pressure switch opened 4 times during a run cycle. ► This is a "Soft Lockout" which will automatically reset after 1 hour. Qty Possible Causes: 2 Bad Inducer Motor 1 Water in Vent 4 Clogged drain...
22 Nov, 2023 Comments: 0
TM9X/TM9E - Flashing Code 4
York Gas Furnace: TM9X / TM9E Re: Flashing Code 4 Code 4 = Main limit switch has opened its normally closed contacts. The control will operate the supply air blower and inducer while the open limit condition exists. ► If the limit switch has not closed within five minutes, the control will...
21 Nov, 2023 Comments: 0
TM9Y - Flashing Code 6
York Gas Furnace: TM9Y Re: Flashing Code 6 Code 6 = Pressure switch opened (Code 3) 4 times during a run cycle. ► This is a "Soft Lockout" which will automatically reset after 1 hour. ► There are 3 pressure switches on this furnace. PS1 (1st Stage Switch usually .90") and PS3 (Condensate...
01 Nov, 2023 Comments: 0
58MXA - Flashing Code 33/Fault Code 33
Carrier Gas Furnaces: 58MXA Re: Flashing Code 33 / Fault Code 33 Diagnostic Light Sequence: 3-Short Flashes, 3-Long Flashes (- - - , — — —) On Carrier 58 Series Furnaces, the Primary Limit is wired in series with other limits, including up to two Rollout Switches or a Fusible-Link rollout...
27 Oct, 2023 Comments: 0
D2NP - Flashing Code 2
Package Unit: D2NP Re: Code 2 CODE 2 = Pressure switch "Open" with the inducer motor energized. Qty Possible Causes: 1 Bad Inducer Motor Bad Pressure Switch 1 Clogged Pressure Port Item Stuck in Inducer Wheel Bad Ignition Control Board ...
18 Sep, 2023 Comments: 0
4YCC4 - Flashing Code 3
Trane Package Unit: 4YCC4 Re: Flashing Code 3 Code 3 = Pressure Switch Fault A Code 3 will be generated in either of the following conditions: The pressure switch failed to close with the inducer motor energized. The pressure switch failed to re-open with the inducer motor de-energized. ...
18 Sep, 2023 Comments: 0
YZF - High Pressure Faut (Cooling)
York Heat Pump: YZF Re: High Pressure Lockout - Last Mode Heat Pump (Cooling) The heat pump was running in cooling mode and the high pressure switch tripped. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red = 2 Flashes ...
18 Sep, 2023 Comments: 0
GCSS92 - Flashing Code 4
Goodman Gas Furnace: GCSS92 Re: Flashing Code 4 Code 4 = Limit Circuit Open The Limit Circuit consists of two Manual-Reset* auxiliary limits (on each side of the blower housing) and one Auto-Reset primary limit (above the burners). * The diagram and installation manual show Manual-Reset...
14 Sep, 2023 Comments: 0
GCSS92 Fault Codes
Goodman Gas Furnace: GCSS92 Re: Lockout Codes # of Flashes Description Off No Power or Faulty Control On Normal Operation 1 Ignition lockout (3 failed tries) - 1hr Auto Reset 2 Pressure switch stuck closed 3 Pressure switch stuck open 4 ...
14 Sep, 2023 Comments: 0
GMS8/GMS9 OR GCS8/GCS9 - Fault Codes
Goodman Gas Furnace: GMS8/GMS9 OR GCS8/GCS9 Re: Lockout Codes # of Flashes Description Off No Power or Faulty Control On Normal Operation 1 Ignition lockout (3 failed tries) - 1hr Auto Reset 2 Pressure switch stuck closed 3 Pressure switch stuck...
14 Sep, 2023 Comments: 0
Durastar - Error Display (Indoor)
Durastar Mini-Splits Re: Indoor Diagnostic/Error Codes When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer lamp may turn on or begin flashing, and an error code will be displayed. These error codes are described in the...
16 Aug, 2023 Comments: 0
Configure 3-Stage Heat, 2-Stage Cool Heat Pump
Honeywell Thermostats: TH8320R & TH8321R Re: Configure the thermostat for a 2-Stage 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...
10 Aug, 2023 Comments: 0
Climatemaster- Code 4 / LT1 Fault- Cooling
ClimateMaster Heat Pump: Cooling Re: Code 4 / LT1 Fault Code 4 = Low Water Coil Temperature (FP1 or LT1) LT1 FAULT SHOULD ONLY OCCUR IN THE HEATING MODE. AN LT1 FAULT IN COOLING MODE TYPICALLY INDICATES A BAD SENSOR. The LT1 sensor is located on the Water Coil side of the expansion...
12 Jul, 2023 Comments: 0
GMP - Flashing Code 3
Goodman Gas Furnace: GMP Re: Flashing Code 3 If, after the vent blower is energized, the pressure switch does not close, the control will keep the blower on and wait for the switch to close. The diagnostic code for this problem is 3 short flashes followed by a pause. ► The diagnostic code will...
04 May, 2023 Comments: 0
T6 PRO - 3Ht/2Cl Heat Pump Setup
Honeywell Thermostat: TH6320U T6 Pro Re: 3Ht/2Cl Heat Pump Setup To enter Installer Setup: Press and hold the "Center" button and the "+" button together for 3 seconds. Press "Select" to enter Setup. Press "Select" to cycle through setup options. Press "+" or "-" to change values. Press...
28 Apr, 2023 Comments: 0
PCG4 - Flashing Code 7
York Package Gas/Electric: PCG4 Re: Flashing Code 7 Code 7 = Failure to Sense Flame (3 Failed Ignition Attempts) Qty Possible Causes: 1 Dirty Flame Sensor Bad Glow Plug 1 Clogged Burners No or Low Gas Pressure 1 Bad Gas Valve Bad...
12 Apr, 2023 Comments: 0
YEE - Fault Code 5
York Heat Pump: YEE Re: Low Suction Pressure - Code 5 (Heating) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) Qty Possible Causes: 2 Low Refrigerant Charge Bad Expansion O/D Valve Bad Pressure Switch Not Defrosting CHECKOUT: 1....
06 Apr, 2023 Comments: 0
YHE/YHG - Code 3 - High Pressure - Cooling
York YHE / YHG Heat Pump: Cooling Re: High Pressure Fault - Last Mode Heat Pump The heat pump was running in cooling mode and the high pressure switch tripped. A High Pressure Lockout is indicated by a 3-Flash LED pattern on the outdoor unit control board. X/L Output Qty Possible...
06 Apr, 2023 Comments: 0
York Sensor Resistance Chart
Sensor Resistance All of York's sensors are the same resistance - 10K Ohm. Temp Ohms Temp Ohms Temp Ohms Temp Ohms 0 85,371 50 19,896 100 5,827 150 2,041 5 75,230 55 17,434 105 5,208 155 1,854 10 62,499 60 15,310 110 ...
06 Apr, 2023 Comments: 0
RPNE - Low Pressure Lockout - HEATING
Rheem/Ruud Heat Pump: RPNE/UPNE Re: Low Pressure Lockout - HEATING Units with model numbers ending in "JAZ" have an advanced defrost control with separate Low and High Pressure inputs and two diagnostic LED's. A Low Pressure Lockout is indicated by the following LED pattern on the defrost...
05 Apr, 2023 Comments: 0
RPNE - Low Pressure Lockout - COOLING
Rheem/Ruud Heat Pump: RPNE/UPNE Re: Low Pressure Lockout - COOLING Units with model numbers ending in "JAZ" have an advanced defrost control with separate Low and High Pressure inputs and two diagnostic LED's. A Low Pressure Lockout is indicated by the following LED pattern on the defrost...
05 Apr, 2023 Comments: 0
YZT Status Codes / Fault Codes
York Heat Pump: YZT Re: Communicating Defrost Board Fault Code Memory: The control stores the 10 most recent fault codes in memory. The codes are stored even when power is removed from the control and will remain in memory until they are manually cleared from the control. All codes...
31 Mar, 2023 Comments: 0
YZT - Defrost Board Replacement
York Heat Pump: YZT Re: Defrost Board Replacement When replacing a Communicating Defrost Board, it is required to manually set the unit tonnage before initial operation. Set the unit tonnage by adjusting the dip switches as shown in the table below. Switch 1 2 3 4 5 ...
30 Mar, 2023 Comments: 0
YZT - Defrost Board - Push Button Function
York Heat Pump: YZT Re: Defrost Board - Push Button Functions The control has a PUSH BUTTON that can be used for various testing functions during installation and service. The Table below summarizes the behavior of the control when the PUSH BUTTON is pressed. Press Duration ...
30 Mar, 2023 Comments: 0
A951X - Flashing E3_2
Ameristar Gas Furnace: A951X Re: Flashing E3_2 E3_2 = Furnace Pressure Switch failed to close on a call for heat. There are 2 Pressure Switches - one connected to the inducer and one connected to the drain line. The Pressure Switch connected to the inducer is the only one that will cause...
29 Mar, 2023 Comments: 0