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Water heater ignited problem? kefarrar 10-06-2007
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Posted by on October 6, 2007, 11:58 am
I have a Rheem 21vp50-1: Gas, blower, electic igniter.

It stopped producing hot water yesterday. I think the problem is the
igniter, but wanted to confirm my suspicion before buying an
ignitor.

After turning the heater on/off many times, reading the diagram, and
playing around, this is what happens:

1) turn ON switch
2) blower starts
3) vaccuum switch causes controller to click (disconnecting hose
prevents this)
4) gas valve turns on (won't happen until after #3). I can smell the
gas.
5) a controller clicks follows-I think this is for the igniter.
6) After ~20 seconds, it repeats 3-5, but no spark, glow or flame ever
occurs

It seems like the controller is doing the right thing.
About 1.5 years ago the controller was replaced, but the igniter was
not.

Anyway, I'm not sure how to test the igniter.
Perhaps I'll put a volt meter across the igniter inputs.

Any help is appreciated.

Kitt


Posted by The Freon Cowboy on October 6, 2007, 12:36 pm
check ignitor for continuity , if infinite or open , its bad

kefarrar@earthlink.net wrote:
>I have a Rheem 21vp50-1: Gas, blower, electic igniter.


Posted by Meat Plow on October 6, 2007, 12:50 pm
On Sat, 06 Oct 2007 08:58:34 -0700, kefarrar wrote:

> I have a Rheem 21vp50-1: Gas, blower, electic igniter.
>
> It stopped producing hot water yesterday. I think the problem is the
> igniter, but wanted to confirm my suspicion before buying an
> ignitor.
>
> After turning the heater on/off many times, reading the diagram, and
> playing around, this is what happens:
>
> 1) turn ON switch
> 2) blower starts
> 3) vaccuum switch causes controller to click (disconnecting hose
> prevents this)
> 4) gas valve turns on (won't happen until after #3). I can smell the
> gas.
> 5) a controller clicks follows-I think this is for the igniter.
> 6) After ~20 seconds, it repeats 3-5, but no spark, glow or flame ever
> occurs
>
> It seems like the controller is doing the right thing.
> About 1.5 years ago the controller was replaced, but the igniter was
> not.
>
> Anyway, I'm not sure how to test the igniter.
> Perhaps I'll put a volt meter across the igniter inputs.
>
> Any help is appreciated.
>
> Kitt

Read:

http://www.hvacware.com/user-cgi/hvaconfig.pl?read=7383


Posted by on October 10, 2007, 7:36 pm
On Oct 6, 11:58 am, kefar...@earthlink.net wrote:
> I have a Rheem 21vp50-1: Gas, blower, electic igniter.
>
> It stopped producing hot water yesterday. I think the problem is the
> igniter, but wanted to confirm my suspicion before buying an
> ignitor.
>
> After turning the heater on/off many times, reading the diagram, and
> playing around, this is what happens:
>
> 1) turn ON switch
> 2) blower starts
> 3) vaccuum switch causes controller to click (disconnecting hose
> prevents this)
> 4) gas valve turns on (won't happen until after #3). I can smell the
> gas.
> 5) a controller clicks follows-I think this is for the igniter.
> 6) After ~20 seconds, it repeats 3-5, but no spark, glow or flame ever
> occurs
>
> It seems like the controller is doing the right thing.
> About 1.5 years ago the controller was replaced, but the igniter was
> not.
>
> Anyway, I'm not sure how to test the igniter.
> Perhaps I'll put a volt meter across the igniter inputs.
>
> Any help is appreciated.
>
> Kitt



Thanks for you input. The ignitor did not have continuity. I ordered
a replacement and now I have hot water.
By the way, on the replacement (not OEM), the screw hole was not quite
in the right place so I had to bend it and drill a new hole. This put
the ignitor in the approximate place the old one was mounted.

Thanks.
Kitt


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