York Air Handler: MV Re: Variable Speed Air Handler - Fan Speed Settings The York MV is a modular air handler which uses a variable speed blower motor. The fan speeds are set by pin settings. The "Heat Pump - High and Low" speeds are set using the "COOL" and "ADJ" pins. The "Electric Heat...

York Air Handler: AVY Re: Variable Speed Air Handler - Airflow Settings The York AVY is a single-piece air handler with a variable speed blower motor. The fan speed is set by pin settings. The "Heat Pump - High and Low" speeds are set using the "COOL" and "ADJ" pins. The "Electric Heat -...

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: MV, AVY 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 (fault code 3) the control will energize the blower until...

York Air Handler: MP, MX, MV, AHP, AHX, AVY 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...