Knowledgebase
YP9C / PC9
YM9M - Sequence of Operation (Heating)
York Gas Furnace: YM9M / PM9 / YP96 / PC9 Re: Sequence of Operation (Heating) There are two styles of York Modulating Gas Furnaces, a Variable Speed Blower model and a standard PSC motor. Both styles have the same basic sequence of operation in the heating mode Pressure Switch Proving ...
13 Nov, 2020 Comments: 0
YP9C - Airflow Settings
York Gas Furnace: YP9C Re: Airflow Settings The YP9C gas furnace is a Modulating, Variable Speed furnace. The Hi & Lo cooling airflow (CFM) can be adjusted with pin settings on the control board. 060B12 080B12 Taps Hi Cool Lo Cool Hi Cool Lo Cool COOL ADJ ...
13 Sep, 2018 Comments: 0
YP9C - Test Mode
York Gas Furnace: YP9C Re: Test Mode During normal operation, the furnace input rate can vary between 35% and 100% of full nameplate input, making it difficult to check for proper operation. To help with the furnace startup and servicing, the control has a TEST MODE available that allows...
05 Dec, 2023 Comments: 0
Water Leak / Clear Condensate Pan Covers
York Gas Furnace Re: Water Leak / Clear Condensate Pan Covers All of the 33" gas furnaces originally came with a clear, plastic condensate pan cover. Over time, the clear plastic pan has a tendency to crack and cause condensate leakage inside the furnace cabinet. Any clear condensate pans...
14 Feb, 2020 Comments: 0
Gas Furnace - Blown Low Voltage Fuse
Gas Furnace Re: Blown Low Voltage Fuse The low voltage fuse provides protection for the control board and other low voltage components in the case of high amperage caused by a low voltage short or excess component load. ► The fuse must be sized per the "VA" of the transformer. Amps = VA...
19 Apr, 2018 Comments: 0
Gas Furnace - Blowing SSU Fuse / Tripping Breaker
York Gas Furnace: YP9C Re: Blowing SSU Fuse / Tripping Breaker The furnace either blows the SSU high voltage fuse or trips the breaker when power is applied. Qty Possible Causes: 2 Bad Blower Motor Bad Control Board Shorted High Voltage Wires Bad...
19 Apr, 2018 Comments: 0
YP9C - Noisy Blower (Heating)
York Gas Furnace: YP9C Re: Noisy Blower (Heating) The YP9C gas furnace has a modulating gas valve, variable speed inducer and variable speed blower motor. Qty Possible Causes: Bad Blower Motor Bad Blower Wheel 1 Clogged Air Filter CHECKOUT: 1....
19 Apr, 2018 Comments: 0
YP9C - Diagnostic Codes/Fault Codes
York Gas Furnaces: YP9C Re: Diagnostic/Fault Codes These York modulating 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: 1 Green Normal Operation - no...
08 Feb, 2019 Comments: 0
YP9C - Flashing Code 3
York 90% Gas Furnace: YP9C Re: Flashing Code 3 Code 3 = Furnace Pressure Switch failed to close on a call for heat. ►The code description on the blower door may say, "Vent or Termination Problem" which is a possible cause, but not the most likely. This gas furnace has two pressure...
13 Mar, 2019 Comments: 0
YP9C - Flashing Code 5
York 97% Modulating Gas Furnace: YP9C Re: Flashing Code 5 Flashing Code 5 = Rollout Switch or Condensate Pressure Switch The rollout switches and the condensate pressure switch are wired in series, so either switch opening during a call for heat will cause a Code 5. Qty Possible...
08 Feb, 2019 Comments: 0

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