Rheem Gas Water Heater Problem staying on?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by micro33, Mar 10, 2005.

  1. micro33

    micro33 New Member

    Mar 10, 2005
    I have a Rheen model 21PV40-1 gas water heater, which is relitivley new. Latley the water heater has been hit or miss at best. the electric igniter will heat up and a short time later the burner will ignite. The burner will run for a minute or two and then shut off. Within 3 to 4 minutes the cycle will start all over again. The vent is now running continually (past two days) and the vent in not obstructed. can you please advise what the problem could be!!
    Thanks in advance!!
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    You could have any of a number of problems. The flame sensor could be bad. The vent air flow sensor could also do it if that is defective. Gas flow could be inadequate shutting off the burner's pressure switch. You should contact a Rheem service person, or else you may start replacing good items and waste a lot of money.
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  4. Master Plumber Mark

    Master Plumber Mark Master Plumber

    Feb 6, 2005
    Sensitivity trainer.. plumber of mens souls
    indianapolis indiana - land of the free, home of
    how new is it??

    Parts are free on your RHEEM water heater if it is less than 6 years old.

    Labor might cost you a little.
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