Question about Goodman GMS90703BXA Heater
My heater try to comes on, but after 10 seconds the circuit board will display an error failure and the light will blink 3 times and theres no code guide on the panel .whats the meaning of the code for a goodman gas heater when it blinks 3 times.
The error code refers to a defective combustion air switch. Coleman Evcons made around 2007 had defective pressure switches or as they call them "combustion air switch". Replace it and the problem is gone.
Posted on Dec 30, 2009
I had 3 blinking lights, i unpluged wire harness from curcuit board blew it out pluged it back in and everything worked fine
Posted on Dec 31, 2009
Check your pressure switch, should look like a plastic circle, older ones are metal. take off the ruber hose and gently blow in it and **** listen for a crackle sound, replace and see if that fixes the problem. also look and see what happens when the unit comes on do you get a redish glow? it might even be your flame sensor see if that is clean, will be near the burners with 1 white wire going to it, take it out sand it and repalce.
Posted on Jan 09, 2009
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Posted on Jan 02, 2017
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Continuous blink once a
second, no pausing - No reply from the jungle IC301 (data
bus is busy, shorted to ground, or held high), IK video path is
One blink - not
used for the self-diagnosis
blinks - B+ over current protection (OCP), unit goes to the
standby mode then displays the 2 blink fault. Could be a short in
supply of any of the circuits.
Three blinks - B+
over voltage protection (OVP), unit goes to the standby mode then
displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
Four blinks - No
vertical Deflection (V STOP), Screen goes to a single horizontal
line then the video signal muted. Check IC1509, Q1505
Five blinks - AKB
circuit (automatic kine bias), the timer/standby indicator blinks
for about 30 seconds then goes to the self-diagnosis function.
Something is wrong with the video. Check video out, Q705, 732, 761
and other components on the C board, also check Q218, 219, 220 on
the A board. In addition, unit could be in IK blanking, try turning
up screen slightly.
Six blinks - No
Horizontal (H STOP), no raster, goes to the blinking self-diagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206.
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