STA-RITE SR400HD Will not stay on. SOLVED !!

If you followed the directions, I suspect that you did it correctly.

Check all grounds to make sure that they are good.

Turn off power to the heater and check the resistance between different grounds to see how many ohms of resistance there are.

The flame current is too low, which could be from a weak flame or a bad ground.

Check the gas pressure to make sure that it's good while the heater is on.
 
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I played around with the new ground wire location and now I am getting solid 2.5 - 2.6, and within 10 seconds it starts dropping slowly and shuts off when reaches 0.3 - 0.4.
I checked continuity of ground points earlier, didn't pay attention to ohms resistance, what number am looking for?
Also, is there a particular way to check the gas pressure ?

Thanks!!
 
There's a pressure tap point on the inlet side of the gas valve.

You can see the inlet tap in the picture below.

If you get a manometer, it should come with a brass barbed x 1/8" npt fitting that will screw into the pressure tap port when you remove the plug.

Turn off the gas at the valve outside the heater before removing the pressure tap plug.

See the video for test procedure.

For resistance, you want the ohms as close to zero as possible.

6290-23-01.jpg




Note: Don't do anything that you're not sure that you can do safely.

Do at your own risk.

If you don't feel comfortable doing any test, consult with a gas contractor to do the test.
 
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I am guessing we found the issue?

I am getting 6.17 when off, and -1.28 when calling for heat.

What could cuase pressure to drop in a gas line? we installed this gas line about 6 years ago and was working fine until last season.

2020-06-04 16.43.58.jpg2020-06-04 16.44.20.jpg
 

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Problem Solved !!
Thank yo to James and everyone else !!

Plumber tested the blew and tested lines, they were clean and no leaks. Next he checked the pressure coming from grid, which has dropped to 1 PSI.
We called Gas company and they came in and changed the meter and regulator and a bunch of pipes.

Everything back to Normal now!

Thanks Everyone !!
 
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