When I turn on my heater the fan turns on within 5 sec, burner kicks in after 10 secs then stays on for 25 secs. All the time the temp indicates 56. Tried cycling three times over an hour with same results. Saw other posts, removed SFS (Stack Flu Sensor) cleaned it (nothing on it) and cleaned both male and female leads. cleaned it three times with same results also.
Ran an OHM meter test get 4 ohms.
Any other things I should look at?
Wife is recuperating and would love to get spa running for her. Thanks.