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Rick
Rick, General Contractor
Category: Home Improvement
Satisfied Customers: 20949
Experience:  Licensed construction supervisor with 35+ yrs. experience.
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ME SENSOR IS BAD, HOW DO i TROUBLESHOOT IT. iT READS AN OPEN

Customer Question

ME SENSOR IS BAD, HOW DO i TROUBLESHOOT IT. iT READS AN OPEN BETWEEN THE TERMINAL AND GROUND.
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: jUST NOW
JA: Do you plan on doing the work yourself?
Customer: yes I already have it out but I do not want to just change parts without a plan
JA: Sorry about that. I must have missed it. Could you tell me again?
Customer: Yes the flame sensor on a Rheem RGRA-12ERAJS reeds an open between the terminal and ground. The burner lights for about 6 secs and turns off and the yellow led on the IFC is never on.
JA: Anything else we should know to help you best?
Customer: I was trying to get HVAC help, am I in the right place
JA: Are you an HVAC professional?
Customer: sort of, I manage many properties
Submitted: 4 months ago.
Category: Home Improvement
Expert:  Rick replied 4 months ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

You don't test a flame sensor to ground. You need a meter that can read in DC micro (not milli) amps. Do you have one?

Customer: replied 4 months ago.
Expert:  Rick replied 4 months ago.

Ok then you have to test the current output forn the sensor while the burner flame is present. Did you clean the sensor?

Customer: replied 4 months ago.
What are the limits and temp I am looking for
Customer: replied 4 months ago.
sensor cleaned with Scotchbrite
Expert:  Rick replied 4 months ago.

No temp? if the sensor is good you should read at least 2 micro amps

Customer: replied 4 months ago.
OK thanks, I'll reinstall and checkThanks
Expert:  Rick replied 4 months ago.

If you get a good reading next thing to check is a good ground for the unit. Check voltage between neutral and ground you should read 0 volts. Stray voltage from ground to neutral will foul up the flame current reading