Question about Heating & Cooling
Had the problem of furnace running for a few minutes and shutting off at the end of last heating season. figured it was the Thermostat and replaced it with a Honeywell CT87K4446 and problem still exists? Replaced the Photo Eye with a Honeywell C554A1463 Cadmium Sulfide Flame Sensor and the Mechanical Controller with a new Honeywell R8184G4009 International Oil Burner Control . Problem still exists? The furnace will run for a few minutes and shut off? Sometimes fan comes on sometimes not depending on if it ran long enough to trigger the heat switch. If you turn the thermostat up and call for heat everything works as it should. If you set it and let it call for heat on its own, you will hear the thermostat click to call for heat and shortly after that it clicks off. As if maybe the thermostat is generating enough heat within itself from just calling for heat and is in turn is shutting off before the fan runs? Do I need to put a relay in between the thermostat and controller so this load at the thermostat will not be present?
Assuming that particular thermostat has a common mercury switch, the wiring behind or just inside the unit may be causing a strong enough magnetic field to throw off the balance of the mercury (liquid metal). The same scenario could be caused by other wiring or devices near the thermostat.
To test this theory, hold a compass as near as possible to the thermostat and wait it to come on automatically. If the needle moves when the switch engages, the magnetic field is strong enough the throw the balance off.
When tucking-in the wires for the thermostat, avoid winding the wires in a spiral or wrapping them around anything. An active current through wrapped or winding wires will create an electromagnetic field.
Posted on Oct 29, 2012
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
The problem you have is water in the exhaust pipe.
Check to see if the pipe has sagged anywhere or if there is a trap in the line.
If you hear gurgling then it is definetly water....
Some times can be hard to find, even a pipe 1/4 full will cause problems. They are very sensitive to flue problems.
Make sure that the flue pipe either runs back to the furnace or out to the outside, a continuos slope either way witha high spot in the middle.
Also check the bottom drain of the blower if it has one, have had them plug and trap water also..
I hope that this will help you to solve your problem!
Thanks for using Fixya!!
Posted on Dec 24, 2009
You don't say if the blower is coming on, no blower would cause the limit to open. By the way, the limit is internal and auto-reset, not the manual reset roll out switches on the burner assembly.
Posted on Jan 11, 2010
Tips for a great answer:
Sep 28, 2015 | Heating & Cooling
Mar 02, 2017 | Honeywell prgrammable thermostat RTH2300B
Jan 11, 2014 | Rheem Heating & Cooling
Check the flame sensor and/or the grounding from the burner ot the ignition control....it is not sensing the flame...
Here is a tip that will help you try to figure out why your furnace is not working.
Basic Furnace or Heating System Troubleshooting
Feb 25, 2011 | Heating & Cooling
Mar 11, 2009 | Carrier Heating & Cooling
Jan 25, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...
Dec 11, 2008 | Ruud UBHC Air Conditioner
Nov 07, 2008 | Honeywell Focus 6300B 5-2 Days...
Sep 19, 2008 | Honeywell Power Humidifier: Furnace...
353 people viewed this question
Usually answered in minutes!