I have a RUUD model 1826 or 2100 spa-pool heater. These are the only numbers I can find on the unit. How can I tell which model it is? What are the BTU's? Can I get a manual for it?

all the parts needed will be in the kit. usually, its the control valve and the jets that get replaced. my manual shows its the same part all units. HAXCNK0002

it is the rollout fuseable link replace then check gas pressure if too low need new gas line or meter you will see sooting this means the heater overheated also if all others ok could have been windy day and it rolled out in which you need a windstack on the top

The part number for the thermistor for your heater is 005299B, officially called the temperature sensor IID it is also refered to a temp sensor or temp sensor kit.

John

No. Make sure there are no programs for the spa. Double check this. I assume this is a pool/spa combination. If so, check the valve actuators at the pool equipment. Do this by manually turning on the pool with your Remote control unit. There should be no water disturbance in the spa. If so, your valve actuators need to be reset. There is a metal toggle switch on the back of each valve that you can switch to set the valves to pool or spa.

*********** board at the equipment may also be the culprit. Try resetting it by pressing the small recessed reset button on the front of the panel with the tip of a pencil or pen. If neither of these slove your problem you probably need a new mother board. They are very expensive. Check to see if yours is still under warranty. Your builder can tell you this or you can email or call Jandy with your model and serial number found on the back of the board. Good Luck

Yes this should be a warrenty part so long as no water is leaking in the heater and getting to it.

you will have to replace the brain unit its shorted out

Look at the sensor that tells unit that everything is lit. There should be some sort of sensor that tells the ECU that the ingnition area is a burn temp. It sounds like the unit can't tell that flame is lit. Hope this helps.