Results 1 to 6 of 6
  1. 02-10-2010, 07:59 PM #1
    bck08
    bck08 is offline Regular Guest
    Join Date
    Mar 2007
    Location
    ohio
    Posts
    4

    york rooftop TDR failures

    I have a york rooftop that uses the tdr sequencer to control the fan during heat. i replaced one back in november then it failed again in January
    (ijust figured bad one at that point) but now it failed again.
    the coil voltage is good the amps going through the contacts are like .05 amps.
    It does not matter but the I.D. blower amps are even good . ( though blower amps should be irrelevent)The system if it fails will work in fan on but that is controlled differently (I know). is it possible that the blower contactor coil could be causing this premature failure?? like I said earlier it last a little over a month. thanks in advance for the info
    Reply With Quote Reply With Quote
  2. 02-11-2010, 12:15 PM #2
    OuTcAsT
    OuTcAsT is offline Professional Member
    Join Date
    Jan 2008
    Location
    Tennessee
    Posts
    52
    A model number would help greatly !
    Reply With Quote Reply With Quote
  3. 02-11-2010, 05:38 PM #3
    bck08
    bck08 is offline Regular Guest
    Join Date
    Mar 2007
    Location
    ohio
    Posts
    4
    model #d6cg060no9925c
    Reply With Quote Reply With Quote
  4. 02-12-2010, 10:27 AM #4
    OuTcAsT
    OuTcAsT is offline Professional Member
    Join Date
    Jan 2008
    Location
    Tennessee
    Posts
    52
    s it possible that the blower contactor coil could be causing this premature failure??

    Looking at the wiring diagram, it does indeed seem that the contactor coil could be the problem, or some sort of short or grounding between the two.
    Reply With Quote Reply With Quote
  5. 02-14-2010, 09:31 AM #5
    bck08
    bck08 is offline Regular Guest
    Join Date
    Mar 2007
    Location
    ohio
    Posts
    4
    outcast, i also thought that the blower contactor coil could be the issue. though i believe when the tdr pulls in it closes the the k-2 relay on the control cirquit board that pulls in the the blower contactor. the blower contactor pulls in fine if you put the thermostat in the fan on position. also one further not i took this sequencer to my shop and applied 24v to it and i can here both sets of contacts snapping in (the other being for the draft motor delay) and both snapping of when 24v is taken off. york recomended converting over to their new cirquit board and eliminate the tdr(sequencer). onw further note this unit does have a return air issue which is being remedied though ithis should have no affect on the tdr contacts going out.
    Reply With Quote Reply With Quote
  6. 02-14-2010, 10:24 AM #6
    tipsrfine's Avatar
    tipsrfine
    tipsrfine is offline Professional Member*
    Join Date
    Sep 2009
    Location
    Arnold mo
    Posts
    3,394
    Quote Originally Posted by bck08 View Post
    I have a york rooftop that uses the tdr sequencer to control the fan during heat. i replaced one back in november then it failed again in January
    (ijust figured bad one at that point) but now it failed again.
    the coil voltage is good the amps going through the contacts are like .05 amps.
    It does not matter but the I.D. blower amps are even good . ( though blower amps should be irrelevent)The system if it fails will work in fan on but that is controlled differently (I know). is it possible that the blower contactor coil could be causing this premature failure?? like I said earlier it last a little over a month. thanks in advance for the info
    Is this unit controlled by a 24v stat? If so, is the stat set elect or gas/oil? I havn't tried to look up the wire diagram yet so I don't know if this could be a prolem-probably not.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules