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  1. #1

    Question

    My central unit when I place unit on heat. Which turns the heater on, I hear the fan running but no air is blowing from the vents. Also,when I place the unit from auto to run. It blows cold air. Could this be a heater relay

  2. #2
    Join Date
    Mar 2003
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    Stoneham, MA
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    What is a heater relay?
    Always give your best effort, be honest, and let the chips fall where they may.

  3. #3
    Join Date
    Jun 2003
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    Hell Hole Swamp
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    Could be lots of things, best bet is to call a pro and have it looked at, you could look in our contractor ads section for someone in your area...

    http://hvac-talk.com/vbb/forumdisplay.php?forumid=8

  4. #4
    Join Date
    Dec 2002
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    Tampa, Florida
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    comments from mainmanscott is exactly what i am talking about. you are captain jackass for the day. "what is a heater relay?". scott, if you are not able to answer the question, why do you waste everyone's time with that stupid remark! people come here for advice, not your butt-headed comment!! share your knowledge or move on. for example, it sounds like you are having mechanic issues w/ the heater, this is where i would reccommend a svc. tech because he will probably have the parts you require. heaters are high voltage operation. non-experienced people most likely won't be able to service this style of heater. i hope you get the point!!

  5. #5
    Join Date
    Mar 2003
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    Stoneham, MA
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    Hey badbillr, who do you think you are calling me names for asking a question, or as you refer to, a "butt-headed comment."??? I am new in the field and haven't heard of a heater relay before. Maybe I know what it is and call it something else. Why don't you enlighten me a pass along some of your knowledge, or go drink a tall glass of shut the hell up.
    Always give your best effort, be honest, and let the chips fall where they may.

  6. #6
    Join Date
    Sep 2004
    Posts
    172
    gldillingham If this is a gas unit most likely what you hear is the combustion air fan running and your blower fan is not coming on due to the gas burner not firing what have you got there big g is it a gas unit??
    When you give a lesson in meanness to a critter or a person, don't be surprised if they learn their lesson.

  7. #7
    Join Date
    Jan 2004
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    Lancaster PA
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    Could be too many things to guess with the limited info you gave.

    Swampfox gave you the right advice.

    Whats a heat relay?

    Any relay that activates heat.
    Could be single pole, or double pole.
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    How many times must one fix something before it is fixed?

  8. #8
    Join Date
    Mar 2003
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    Stoneham, MA
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    So it's not a specific type of relay, but a general purpose relay used in that application?
    Always give your best effort, be honest, and let the chips fall where they may.

  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    66,771


    Yes.

    On the schematic of some units they will label a relay as the heat relay, what type it is, depends on the manufacturer.

    I was working on a Applied Air unit last week, its heat relay was a 3 pole, 120 volt coil contactor.
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  10. #10
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    In my quest for knowledge, I've been reading about potential relays and current relays, so my mind was on the type, as in how it works, not the application. I suppose then you can call a relay anything, for whatever purpose it is being used for. Guess I was overthinking.
    Always give your best effort, be honest, and let the chips fall where they may.

  11. #11
    Join Date
    May 2004
    Posts
    659
    That makes me think of one I saw the other day. It said on the box, "Definite purpose relay". Only, it didn't say what that definite purpose was. If it was so important to call it a definite purpose relay, shouldn't they at least say what its purpose was?

  12. #12
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    I have always wondered about that myself, and still have no idea what that purpose is.

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  13. #13
    Join Date
    Dec 2002
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    Tampa, Florida
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    mainmanscott- you have over 180 posts and you are trying to tell me you never heard of a heat relay, not exactly buying it. i think that was a retorted statement to defend your post and maybe guilt me in to feeling bad. sorry if you really don't know what one is, but i bet you have seen one!! trane used them alot for their heat strips. sometimes it was an 8-pin relay( brown body w/ 2 set of n.o. & n.c. contacts) or a contactor. relay strong, but contactor stronger. sorry for gitt'in on ya!

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