I have a 40 Gal GE Gas WH which is now about 10.5 yrs old, came with the house 3 yrs ago.
Naturally this WH had a 9 year warranty which is now expired.
The symptom I am experiencing is that the temperature of the water can vary quite widely.
In the morning, the water is barely hot enough to take a shower.
30 mins after the shower, it's much hotter.
Seems to me that the Thermostat/Gas Valve is not functioning properly, and needs to cool excessively before it turns the burner back on. Thermocouple was replaced about 1 yr ago due to pilot not staying lit. No issues with the pilot now.
The valve/tstat is a Robertshaw R110RTSP and the online pricing runs about 180 at the low end.
When I can get a BigBox WH for 500-600, or a BW online for 900-1000, does it make any sense to put that much money into a new valve?
Tried flushing it out over the past weekend, didn't get a huge amount of sediment, just some particles of sand and crap, and got pretty hot water right after it refilled and reheated, but the next morning it was lukewarm again.
Any suggestions gratefully accepted.