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Dec 18, 2012 - Uploaded by JRESHOW .
cause this fault. 2 RED FLASHES: This indicates that thenormally open pressure ... The furnace will lock out for one hour and then restart. 7 RED FLASHES: This fault code indicates that the flame could not be established. This no-light ... problem. Bothheating and cooling operations will be affected. Check
IF YOU LOST POWER WHEN FURNACE WAS RUNNING IT TRIPPED ROLLOUT SWITCHES AND POSSIBLY THE HIGH LIMIT . IN CENTER OF ROLLOUT SWITCHES IS A LITTLE RED BUTTON THAT YOU RESET . YOU CAN ALSO TRY FINDING HIGH LIMIT WITH POWER SHUT OFF TO FURNACE PULL BOTH WIRES OFF HIGH LIMIT AND USE PAPER CLIP TO JUMP BETWEEN THE TWO WIRES MAKE SURE YOU DONT SHORT OUT AGAINST ANY METAL WHEN YOU TURN BACK ON IF IT WORKS YOU NEED A NEW HIGH LIMIT SWITCH.
see this causes and fix it. God bless you If the furnace won't run, check the electrical service panel
for a blown fuse or tripped breaker. Also make sure the power switch on
or near the furnace is turned on. Check the unit for a reset button and
try it. Some units have a built-in breaker or fuse panel. However you can have a missing 1 phase , test with the VOM, for to measure voltage. Or motor need repair for winding trouble,bearing.If you do not have enough experience call some electrician. God bless you
Usually when the furnace blower motor runs all the time
The limit switch or rollout switch is usually open or bad.
The furnace board is seeing that one of those switches is open, so it brings the blower on to try to get the heat out of the combustion chamber area, so the switch will close. But if the switch is bad and won’t close, the furnace board will keep the blower running continuously.
First find the electronic control board. Is the diagnostic light on and flashing a code? If not look for the automotive type fuse on the board. It is a 3 amp. Is it blown? Next look for a screw in fuse in the ssu switch on the side of the furnace. Is it blown? If all the fuses are good is the door switch behind the front cover working? Is the door properely installed? If all these items are working, you should have power to the furnace. If these items are ok, check for 24volts at the transformer. Check the terminals not black and white. If you have voltage there, remove the red and white thermostat wires on the control board. Next take jump wire and jump the red and white terminals. This rules out the stat and stat wiring. Your furnace should start. Check the status light for any further problems and crossreference the flashing light code to fix.
1.Not an expert with natural gas furnaces. 2.Statements below are from my own personal experience, and knowledge from.
The red blinking light you see is on a computer control board. The flashes of the red light represent a type of code. Think of it as a Morse Code, if you will.
For example: Red light blinks three times rapidly, pause, then blinks one more time. This code represents a particular fault. (Fault = Problem)
There is a sticker, with a chart of codes listed for this red light. It is usually placed very near the red light.
A gas furnace should be repaired by a competent HVAC technician. This is not a device that should be attended to, by those who are not trained. An HVAC technician will know where to look, what parts are needed, and if the gas furnace is safe enough to put back on line. (Safe enough to use)