... rheem criterton 2 rgph 10eamer... 100,000 BTU... 80%... 8 years old with the thermostat off the fan stays on all the time... also... no heat... not fireing and so because its not fireing the gas don't come on... please... if you can help... thanks very much... richard...
Updated... 3 blinks and 2 second pause on the 0k light says the linit is open... please where is the linit I can't seen to find it... I have no spark.. so the gas don't come on... the blower stays on all the time... so I have to turn the main power off to stop it... thanks for your help... richard

Does the hot surface ignitor come on? Not sure if this model has a glow ignitor or not but if it does after draft motor kicks on you should see the hot surface ignitor glowing.

Read my question again... tks