York Air Handler: AHX/MX Re: Lockout Codes / Fault Codes The air handler control shall provide fault codes using the Status LED. The table below describes the LED displays during fault codes. The "lockout" can be Reset by cycling power to the air handler. LOCKOUT CODES: Flashes ...

X-13 Motor Failure The X-13 ECM motor used in AHE, AHX, MX, and some Packaged Units has shown a high failure rate. It is common for the motor to periodically fail to operate. Sometimes power can be removed and restored to the motor, and the motor will begin operating again. The...

York Air Handler: MP, MX, MV, AHP, AHX, AVY Re: Auxiliary Heaters Not Working The 4HK heater kits for these air handlers consist of In-line beakers, a control board, snap-disc limits, and DC voltage relays. The control board has two heat stage inputs, "W1" and "W2". In some instances, "W1"...

York Air Handler: AHX, AHP, AVY, MX MA Re: Directional Heat Issue Problem Description: Blows cold air in emergency heat and defrost Observed Symptoms: Air handler with supply going two directions (see attached drawing) Problem with electric heat only Duct to the back of the air handler...

York Air Handler: AHX/MX Re: Flashing Code 2 The control board in the air handler monitors the limit switch in the aux heaters. Code 2 = Limit switch opened two times with NO CALL FOR HEAT. This is a Hard Lockout condition that will keep all heater outputs off. The blower will...

York Air Handler: AHX/MX Re: Flashing Code 3 - Fan Running Continuous The control board in the air handler monitors the limit switch in the aux heaters. If the limit switch opens multiple times during a single call for electric heat the control will flash a Code 3 and energize the blower...

York Air Handler: AHX / MX Re: Fan Runs Continuous, Flashing Code 4 Code 4 = Extended Limit Trip The control board in the air handler monitors the limit switch(es) in the aux heaters. If the limit switch opens for a long duration (Fault Code 4), the control will energize the blower until...

York Air Handler: AHX / MX Re: Flashing Code 5 Code 5 = Multiple Extended Limit Trips A Fault Code 5 is generated from the following sequence of conditions: If the limit switch opens for a long duration (Fault Code 4), the control will energize the blower until power is removed from the...

York Air Handler: AHX / MX Re: Flashing Code 6 A Fault Code 6 results from the following sequence of conditions: If the limit switch opens for a long duration (Fault Code 4), the control will energize the blower until power is removed from the control (heat outputs will continue to cycle as...

York Air Handler: AHX/MX Re: Fan Running Continuous - No Fault Codes The customer reports that the indoor blower runs continuous. ► This is normally associated with a Code 3 on the air handler board, but in this case there is no fault indication on the board. Qty Possible Causes: ...