Intermittent Rattling


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Old 07-05-15, 04:44 AM
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Intermittent Rattling

Once in a while (1/week, 1/month, random) my water heater will make a horrible/loud rattling sound during the middle of the night for about 10 seconds. It's enough to wake us up and scare the crap out of you.

I guess it's possible that it's my furnace instead, but it started after installing a new water heater.

If my heater needs to be flushed, would it behave this way or would it be noisy on a consistent basis?
 
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Old 07-05-15, 07:39 AM
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Can you tell us the make & model, of it? Isn't the furnace off, this time of year in Arizona? Is the water supply from the municipality or a well? Drain a little water from it to see if it's discolored.
 
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Old 07-05-15, 09:18 AM
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My water heater regularly makes an intermittent popping or cracking sound but I've always thought it was just expansion/contraction. How far is the water heater from your bed room?

btw - welcome to the forums Gordon!
 
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Old 07-05-15, 06:43 PM
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A new water heater shouldn't need to be flushed.
 
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Old 07-05-15, 06:47 PM
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BTW: It's from Bradford White, model # M45036FBN. 50 gal, natural gas.

I ran the drain just a little bit and the water was clear. The water source is from the town (not well).

Thanks
 
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Old 07-06-15, 05:05 AM
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Does the tank set on a base or directly on the floor? Can you rock it by hand?
 
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Old 07-06-15, 08:03 AM
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Could it be the relief valve lifting? Check were the relief valve drain piping ends for dampness.
 
 

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