20 Most Recent Honeywell Ct87n "the Round" Heat/cool Thermostat New/fresh/sealed Questions & Answers

wired wrong double check wiring

These are color codes wires for terminals that control fan relay,start,stop, temp-up/down ect. Also you can trace out those wires, Where they are going and what terminal on the wiring schematic they control.

https://www.lowesprosupply.com/Catalog/Water-Heaters/Water-Heater-Parts/Gas-Valve/GAS-VALVE-FOR-AO-SMITH-WATER-HEATER-702210Looks like a good place to start. Plenty on Amazon and Ebay but I wouldn't buy them from there.

Timer setting is given of page 11 of user manual User manual Honeywell CT1501 (English - 28 pages)

replace it

Some time ago I had that happen and because of the age my repair man said it would cost too much to repair it. The problem was a worn out thermostat.

replace valve

Gas valve might be bad... The honeywell gas valve for atmospheric models is generic and can be replace without removing from heater. Following links have resources: http://waterheatertimer.org/How-to-replace-Honeywell-gas-control-valve.html http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#honeywell

try unplugging the power to the unit it should rest it

This is likely a gas valve issue. Call a repair person, it is not recommend you repair it as there is a danger of explosion.

More than likely the gas valve is defective.

Resources appear on following link: http://waterheatertimer.org/troubleshoot-gas-water-heater-thermostat.html#honeywell If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

No, the the defective valve is only on gas fireplaces and stoves, not hot water heaters.