Atwood 8940 Iii Dclp Troubleshooting Free To Call

I have made sure the igniter works and is clean and spaced the 18.The control board has no codes on it.

The blower and propane solenoids are working fine and Im getting a 63-65 volt reading on the igniter wire using a digital voltmeter (with the igniter wire connected at both ends).

If you smell propane you do have a problem with your ignitors and they may need to be cleaned or replaced(call a qualified tech to do this).

If you dont smell propane you have a gas supply problem or your gas valve is not opening.

Test the gas by lighting a burner on your stove top and turn on the furnace when it tries to ignite the flame on the stove should remain the same, if it gets smaller you do not have enough gas pressure.

Lastly to answer your question carefully remove the Computer Curcuit board and you can take it to any RV repair center and they can test it for you to be sure the ignitor is sparking strong enough.

Atwood 8940 Iii Dclp Troubleshooting Free To Call

Please feel free to call me anytime if I can answer any more questions regarding the furnace.

Now it wont blow air at the startup or even work with the heat cycle.

The AC works fine.

Any ideas Im 2000 miles from home and any Lance warranty centers.

After replacing the propane valve, sail switch, checking circuit board, checking the limit switch, it wouldnt ignite.

It turned out to be in the gas valve not getting the proper pressure to the heater.

Lifted the little cap off the gas valve and inside turned the inserted screw very gently till it stopped.

Do not tighten. The furnace has worked perfectly ever since.

After doing some research and reading many blogs I took my furnace apart and looked at the control board.

Nothing was burned on it and the green light was blinking once and then again 3 seconds later.

The sail switch tells the unit that there is plenty of air flow and it is safe to continue firing the furnace up.

The furnace is rated to be safe and not ignite if the blower doesnt produce enough air flow(70).

The sail switch is located on the underside of the blower motor (squirrel cage) housing.

It has been known for these switches to burn out and not allow the furnace to work.

I called atwood and they said that because this furnace was discontinued that there was no replace part listed for the sail switch.

I was told I would most likely have to purchase a new furnace.

I went on amazon and found this switch, Atwood 36680 Sail Switch.

No charge for what I know.

Thanks.

If not it just keeps trying to light on and on beyond the three or four tries.