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My carrier 59 mvp Furnace has a problem with moisture in the vent outlet. The furnace will not fire up intil I losen the clamp and drain the moisture. I have to do this almost daily in when it is very cold.

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  • gdnarcisi1 Dec 03, 2008

    Checked the vent pipe outside my home. No blockage. Any other ideas?

  • gdnarcisi1 Dec 03, 2008

    Proton 77. You may have hit the nail on the head on this one. I will try exending the pipe or adding an elbow.
    Thanks for the help!

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HI
The first place to look is at the furnace brain, a box located somewhere in the unit connecting to the gas valve, look at this brain [controller] and there should be a light of series of lights.

On the box itself there should be a matrix of codes such as: green light flashing= bad glow plug, or red, bad controller box, do you have anything like this?

Most have some sort of led light that narrows down the problem.

If not at least do these things:

make sure the power is off, and that the blower motor spins by hand freely.

next if you have a volt ohm meter, you can test the plug to see if there is a circuit, if the glow plug is open, that is one problem,

If you have a volt meter you can measure the leads at the plug to see if voltage is there or not.

There are so many checks and switches that will operate dependent on the operation of something else.

Unplug the furnace and keep the power off the brain, if so equipped for several minutes, see if it resets.

If it does great, if not tell me if there is a brain box and what the lights are, and what the matrix of light codes say, and we can go from there.

You can also measure for voltage from the thermostat to the furnace and make sure it is getting a signal on all wires, a thermostat wire could have come loose.

very difficult to troubleshoot a furnace when one is in front of it, let along without seeing it.

If you find no box, let me know, and let me know from these checks above if anything changes, or gives you more info to pass on to me.

Step at a time we can find this, a volt ohm meter will be really helpful.

Posted on Dec 03, 2008

  • ABHISHEK.C
    ABHISHEK.C Dec 03, 2008

    Sandwiched between the coils are a compressor, two fans, a motor, and thermostat controls. Dirt is the biggest enemy of window air conditioners; it can lower the efficiency of the evaporator coil, block the operation of the fan that blows out the cool air, 



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You need to see if you can extend the intake pipe out a few inches further as not to **** in the moist exhaust air or put an elbow on it facing horizontal away from the exhaust. You get freeze ups in 3 common instances: if your pipes aren't sloping back towards the furnace or you are sucking back in moist exhaust, or you have them buried under snow. Carrier will not have a record of problems because it is not a flaw with the unit itself, just how it is vented and recirculating (most likely). Thanks proton

Posted on Dec 03, 2008

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  • Vent dryer and furnace flue pipes directly to the exterior
  • Properly seal all ductwork for airtightness
  • Install rain caps over roof vents to prevent water penetration
  • Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Install a fresh air exchange system to prevent elevated indoor humidity levels Install continuous soffit and ridge vents

thanks
good luck

Posted on Dec 03, 2008

  • Asfiya Ahamed
    Asfiya Ahamed Dec 03, 2008

    install a fresh air exchange system to prevent elevated indoor humidity levels

    install continuous soffit and ridge events




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Have you checked to make sure the inlet pipe is not blocked - be sure the screen is in place on the outside

Posted on Dec 03, 2008

  • Jay Glendenning
    Jay Glendenning Dec 03, 2008

    You say that you have to do this almost daily .. When does this occur? When you wake up in the am after the furnace starts to go into a daytime use as controlled by a programmable thermostat?

    What is the daily temp/night time temps set @ ?


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