Not Enough Hot Water
Posted 20 February 2006 - 09:31 AM
I come again with questions about my hot water tank. It's an AO Smith, 50-gal unit fed with natural gas. Unit was installed in 1999 with new house...yeah the warranty just expired. To get nice hot water, have been turning up the thermostat little by little. Currently, is set at the absolute max temp, but the hottest water we get out of the tap (closest sink) is 143F. With extra folks in the house this weekend, noticed that we ran short of hot water sooner than normal.
The pilot and burner all look good. Nice clean flame, good distribution. Heater flame seems to cycle on/off just fine. Went to Smith's website and technical bulletin says for low temps to "check the thermostat" and the dip tube. Short of draining the tank and making a hell of a mess, is there an easier way to do these things ?
Also, at ~7years old, do you folks recommend spending the $100 for a new thermostat (from Smith's website)? And, if I'm going to take the time to drain the tank and do repairs, should I consider any other overhaul items?
Thanks in advance.
Posted 20 February 2006 - 11:29 AM
Posted 25 February 2006 - 05:31 AM
What worked for me when I had a similar problem is a "power flush". Set the heater control to pilot (or off). Shut off the inlet and open a hot tap. Drain the tank. Close the hot tap and open the inlet. Now your tank is part-filled with compressed air. Open the drain valve -- a lot more sediment gets blown out of there than with a regular drain. Close the drain valve again and open a hot tap to get the air back out of the system. Once the air is out, turn the heater back on.
Posted 12 March 2006 - 07:05 AM
Posted 12 March 2006 - 10:10 AM
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Posted 30 March 2006 - 02:53 PM
The old dip tube is crack.
The original joints were all soldered and needed to be cut.
A new two-end compression joint is used for easy connection without soldring.
Replaced with a new dip tube and the water heater returns to normal.
Posted 17 May 2006 - 02:30 AM
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