The heater is shutting off, the outside indicator is flashing red and the inside temperature gauge is flashing 99. I have plenty of gas and it will restart, but then go off and begin flashing 99 again.
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Re: the heater keeps shutting off , getting a 99 code
Remove the flex hose from the flue pipe inside the house. Try to start the stove. If it runs there is a problem with the flue. If it's been very cold look closely at the pipe around the exhaust pipe. That is the air side. There could be frost built up inside the air pipe. If so it will shut off the gas and you can't run the stove.
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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 my description of what your heater is doing please read through to the end.
The heater is turned on and a room temperature is selected.
You can hear the noise of a small fan start, which shortly after the heater starts.
After a short period of time the heater stops and the red led begins to flash and shuts itself down.
This type of heater has a balanced flue, which means it draws air in one pipe and exhausts it out another.
Have the balanced flue checked for blockages, the problem will most likely be in the flue pipe which draws the outside cool air into the heater and not the flue pipe which blows out the hot air.
it may be full of cob webs or something else which restricts the air flow to the heater.
A service person can perform a quick test to prove the above theory. At the rear of the heater there are two pipes, one is an insulated metal pipe and the other is plastic pipe.
Disconnect the plastic pipe from the flue box and restart the heater.
If the heater runs normally this will confirm that there is a blockage.
Yes, go to where you see the red or green flash. This is a code light. On the panel inside, you will have a paper code sheet glued to panel. It will tell you what the flashes mean and what is causing it, a failure code. You can kill power to the furnace for a minute or 2, and it should reset. But look for this code sheet . The light should be on the circuit board. Shastalaaker7 Let me know. I will be back shortly.
We don't get that cold here so that is a interesting ?? I would assume at those temperature that the furnace would be running almost all of the time and would condernse alot of water... It the drain system on the furnace is getting blocked up it will cause the pressure switch to not close. I would check all of the traps and hoses to make sure they are open.....and draining, You could put armaflex Insulation on the 2" flue pipe to help keep it from getting so cold.... Is it freezing on the exhaust or the intake hub? You can take the inlet pipe off at the furnace and use the inside air instead of outside air when you are running the furnace at -20 outside temperatures.... but keep the exhaust pipe hooked up to the furnace and keep venting it outside... Then I would hook the intake back up when the outside tempertures got warmer......I don't know if this helps but its what I would try...
not knowing wich one is on, this red light could be your power indicator light..
it stays on during any operation,
you should be able to see it through the sight glass
if it were flashing,,,, there would be a problem
there isnt a pilot if it has jets , it has a Hot surface ignitor. you should see a glow and then the jets light , if its running for a few min it may be overheating, have you changed the filter recently? you should also have a flash code you can locate when the furnace shut off and is no longer doin what its supposed to look thru the bottom door peep hole and watch for a series of red flashes. if you remove the cover after retrieving the flash code there will be a chart on the inside of the cover that will tell you why the furnace is shutting off. by the way the model # you gave is for the A/C coil above the furnace, not the furnace.
Unfortunately this was a firmware bug in the early models. The "CC" is simply indicating that the temperature reading is under 0 degrees. The actual problem is that the thermistor curve is implemented in firmware via a lookup table. Temperatures below -10 fall out of the table and the firmware incorrectly interprets this as being a hot temperature. The only fix is to replace the control.
The HH indicates that the control believes that the temperature is over 99. This happens when a) it is over 99 degrees (not likely or you would not be using the heater), or b) the thermistor is not plugged in or bad.
a) unplug your heater
b) remove the control cover (two screws where the display and knob are)
c) find the thin black wires with a green connector on the end. The other end of the wire are attached to the thermistor which looks like a balistic missile.
d) plug the green connector onto the white two pin connector on the circuit board. This is the only place that it will fit.