Airflow problem or open fuse. This was a brand new furnace.

Airflow problem or open fuse. Apr 22, 2021 · Four red flashes- High limit switch open or defective temperature sensor or 24 volt fuse is open. Aug 10, 2022 · Facing poor HVAC airflow issue? There are many causes behind it, from dirty air filters to leaking ducts. It was stuck open. This was a brand new furnace. So my point is, check continuity on your limit switches & rollout switches when everything in the furnace is not hot. Oct 11, 2024 · Four red flashes indicate that a 24-volt fuse or the high-limit switch is open. " AC system was icing up, dripping on board - replaced board and ECM motor - SAME issue!! Feb 10, 2025 · 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. So when there was a call for heat, it just wouldn’t do anything but go into a purge cycle. . Possible causes include an improperly sized ducting system, a dirty air filter, a faulty blower motor, an open fuse on the control board or restricted circulating airflow. Five red flashes signal that an auxiliary limit switch or a rollout switch is open. Yesterday I had a furnace that flashed a code for “air flow or open fuse” The problem was actually a faulty limit switch. Jul 2, 2021 · It gives 4 flashes "AIRFLOW PROBLEM or OPEN FUSE" then goes into an 11 FLASH "Check blower motor, wiring. Five red flashes- Rollout switch or condensate pressure switch is open. Here are the 12 common HVAC Airflow problems and their fixes. This may be caused by a dirty air filter, improperly sized duct system, faulty blower motor, restricted circulating airflow, or an open fuse on the control board. oegvxi whgzclb jdouqi qxbghs yhsfm cqmf qyab jaflpnsj off eenmln