Question about Heating & Cooling
Will not turn on has power and I even tried by passing thermostat and still nothing. BRRRR its cold.
There should be a removable fuse located on the circuit board when you open the furnace cover which may be the culprit..... Good Luck!
Posted on Jan 13, 2013
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Posted on Jan 02, 2017
Sounds like your repair man ripped you off. He should have stood behind his work.
1. I would try to clean the flame sensor located just below the burners. It is connected to "one" wire (Not the two wire) clean rod with sandpaper.
2. The old and thermostat could have a had a bad heat anticipator. if the new t/stat is not digital the heat anticpator on the T/stat needs to be adjusted. slide the small adjuster arm under the cover to about .6 or .7 and see if the solves the problem. if the t/stat is digital it should be preset from the factory.
3. last resort have a service man check your pressure swith. could be a slow inducer motor, blocked or bad vacum line, or a restricted drain or flue pipe.
Posted on Mar 08, 2009
SOURCE: furnace blows cold air
Sometimes the fans kicks in by time ---or by heat...even if the heat cycles dont starts . Is this gas or electric,, name brand,.... model # ect...ect..
Posted on Dec 19, 2009
Having to reset it tells me that there is probably an error code blinking on the control board. Look for a small viewing port that looks into the cabinet. Count the number of blinks then remove the panels to find the wiring diagram pasted on one of them. On the diagram you will find a diagnostic code to help you narrow down the problem. It could be as simple as a plugged air filter.
On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.
What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).
Posted on Feb 09, 2010
Sounds like the switch that controls the blower is faulty. It should heat up then come on at preset temp. As for the stat where is it located. It should be located 60" off the ground not in any direct sunlight and make sure it is insulated behind the stat. You could have more heat loss in those rooms too. IE poorly insulated windows air penetrating through outlets do those walls face the wind? Is the stat located next to a heat supply?
Posted on Dec 16, 2010
Testimonial: "Thank you! I will look into getting the switch checked and verify the stat location. I appreciate your assistance! "
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