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717logan
water heater

Brand: State Select gas water heater 40 gallon,
Model # PR640XCVIT & Serial # F06A000549

The water heater locks, and doesn't heat the water.

UNIT IS LOCKING (not heating water)
**lights A & B turn on...(which means system is lockout) -
there are 4 solutions on the trouble shooting-
1- gas is off or too low to operate
2- hot surface igniter not positioned correctly
3- low voltage to the water heater
4- electric polarity to unit is incorrect

The unit have been working over five (5) years, never had issues till know. I have to disconnect and reconnect the water heater, which heats the water for a couple of hours, then it locks again (no hot water); have been doing this since December.

I hope is clear

Thanks

dj1
Re: water heater

I read your posting twice - and still can't tell what you are writing about.

Can you re-write it more clearly, more accurately and more precisely?

keith3267
Re: water heater

Is it an electric water heater or a gas water heater? What brand.

717logan
Re: water heater
keith3267 wrote:

Is it an electric water heater or a gas water heater? What brand.

Brand: State Select gas water heater 40 gallon,
Model # PR640XCVIT & Serial # F06A000549

The water heater locks, and doesn't heat the water.

UNIT IS LOCKING (not heating water)
**lights A & B turn on...(which means system is lockout) -
there are 4 solutions on the trouble shooting-
1- gas is off or too low to operate
2- hot surface igniter not positioned correctly
3- low voltage to the water heater
4- electric polarity to unit is incorrect

The unit have been working over five (5) years, never had issues till know. I have to disconnect and reconnect the water heater, which heats the water for a couple of hours, then it locks again (no hot water); have been doing this since December.

I hope is clear

Thanks

HoustonRemodeler
Re: water heater

Maybe the exhaust is blocked?

When was the last time the crud was flushed out of the HWH?

717logan
Re: water heater

Thank you

The exhaust is not blocked, we check

What is the crud & how we could flushed it out of the HWH?

HoustonRemodeler
Re: water heater

The crud that builds up are the minerals in the water supply.

Watch this video.

Look for the water to run clear.

dj1
Re: water heater

Take a look at your burner, make sure the mesh is in good condition, look at your flame sensor - it could be dirty (use a fine sandpaper to clean it), make sure there is no debris on the sensor.

Hope this helps.

keith3267
Re: water heater

It could be the control panel itself. In the rush to make everything "digital" things have gone overboard. They add cost, increase complexity and rarely contribute anything. My electric water heater has one of these panels too and so far, it has been the only source of failure with the unit.

Check the warrantee on your unit. I got my replacement panel for free under warrantee but next time, it will cost me $108. Just like my stove and dishwasher, both have "digital" controls and the digital control boards have been nothing but trouble. I want my dials back.

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