Question about Heating & Cooling
LED flashing 3times indicating pressure switch problem. What is the fix?
Posted by Anonymous on
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: MHU45LP won't fire
The pressure switch to which you are referring is the switch connected to the suction side of your induced draft fan. This pressure switch will have a hose connected between the switch and the induced draft fan. Please let me know if you need any more assistance.
Posted on Feb 17, 2009
There is no reset button. The fault will clear itself upon cycling power to the furnace once the problem is corrected. The furnace has to establish air flow before it starts the ignition cycle. Check and make sure that your inducer motor is running during a call for heat and that the flue is free from restriction. eg. bird nests, animals, snow, ice etc.
Posted on Oct 04, 2009
it may be clogged at the barbed fitting on the induced draft motor where the pressuer switch tubing connects. take a paper clip and **** it out make sure you can stick it thru freely till you can feel the Inducer wheel then reconnect and try again.
Posted on Nov 05, 2009
The 3 flashes is an error code. Most likely you have either a vent blockage, the inducer motor is not spinning fast enough to draw a vacuum on the pressure switch, you have a bad pressure switch or a blockage in the hose going to the pressure switch. You can **** lightly on the hose going to the pressure switch to close it or you can jump it out to test it.
Posted on Jan 16, 2010
hi flame sensor is a rod in the flame try cleaning this with some steel wool if not in could be the control box where the sensor conneted to
Posted on Jan 22, 2010
Tips for a great answer:
Aug 03, 2016 | White-Rodgers (Protech) White Rodgers...
Aug 01, 2015 | Televison & Video
Jul 10, 2013 | White Rodgers Water Heaters
Jan 04, 2013 | Heating & Cooling
Feb 22, 2011 | White Rodgers White-Rodgers 1F85RF-275...
Jan 10, 2011 | White Rodgers Water Heaters
Dec 21, 2010 | Ruud Central System Air Conditioner
Aug 15, 2010 | White Rodgers White-Rodgers 1F85RF-275...
Nov 17, 2008 | Sony KP-53HS30 53" Rear Projection...
May 23, 2018 | Heating & Cooling
May 23, 2018 | Coleman Heating & Cooling
156 people viewed this question
Usually answered in minutes!