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My furnace stops burners when the turbine starts control

Customer Question
my furnace stops burners when...
my furnace stops burners when the turbine starts
control valve ok
pressure switch ok
flame sensor ok
Submitted: 2 years ago.Category: HVAC
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Answered in 1 minute by:
12/19/2015
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,788
Experience: Furnace, A/C and heat pump specialist.
Verified

Are you getting an error code on control board?

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Customer reply replied 2 years ago
i don't speak good englosh sorry
i get 3 red and 6 red blinkigs
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK the pressure switch is opening when it should stay closed

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Customer reply replied 2 years ago
ok the pressure switch must ahow continuity qhen is close and no signal when open?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

This can be caused by the following:

1.Blocked vent

2Cracked or loose hose between switch and inducer

3.Gasket on inducer leaking

4.Dirt or debris in hose or fittings between inducer and switch

5.Water in hose between the inducer and switch

6.Deteriorated blower in inducer

7. Defective pressure switch.

Switch has to be open for inducer to start, then inducer has to draw a vacuum on switch and keep the vacuum entire heating cycle,If vacuum is lost burners will not light or will shut down.

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Customer reply replied 2 years ago
pressure switch woking good chequed with continuity and suctioning and blowing the inducer hose
hose clean and new, my furnace have the second winter season just
Customer reply replied 2 years ago
cant i aend you a video?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Remove hose from inducer.leave attached to switch. Allow inducer to start, suck on hose keeping a vacuum on switch and see if furnace will stay on.

You can attach a file using paperclip icon

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Customer reply replied 2 years ago
the pressure switch is 24 hrs new, try the old one?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Board says pressure switch is opening.If you know for sure pressure switch is staying closed, may be bad connection or bad board not sensing it closed.Do you have a meter

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Customer reply replied 2 years ago
multimetter? yes i have
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Have you verified switch is staying closed when we get the error code and it shuts down?

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Customer reply replied 2 years ago
let me try
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Standing by

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Customer reply replied 2 years ago
sorry by the time, when the code 3 red blinking is present the pressure awitch is closed and i taped two litle hole on the pressure switch and now hold the vaccum for 10 more seconds
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

So does board sill show the open pressure switch code with it closed?

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Customer reply replied 2 years ago
the three blinking code stays with the pressure awitch circuit closed, but the burners atay 10 more aecs with the turbine working
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Check the connection at the board.Unplug push wires into connector good and reconnect and see if it will stay on

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Customer reply replied 2 years ago
reconecting and same thing
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

I am going to open to other experts who may have ideas,Sounds like maybe a failing board, but hate to condemn board without being onsite.

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HVAC Technician: HVAC Guru, HVAC TECH replied 2 years ago
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 17,607
Experience: 20yrs in the HVAC industry with certificates and degrees.
Verified

Hello, I am a different tech and have run into this issue numerous times on that unit. You need a new board for sure and will be good to go!

We are on the honor system for our time, all I ask is please rate my service using the STAR RATING LINK on your page before you leave. If you are not happy with the service please let me know before leaving a negative rating. This is the only way I am paid or credited through the site for my time. This will also allow you to get directly back to me for FREE follow up questions and tips are greatly appreciated! Thanks

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Customer reply replied 2 years ago
but my problem isn't solved yet how i rate you?
HVAC Technician: HVAC Guru, HVAC TECH replied 2 years ago

You just need a new board, after a rating you can get right back to me for any followup questions or a refund if needed without issue! Get the board and you will be good to go.

Merry Christmas

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HVAC Guru
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 17,607
17,607 Satisfied Customers
Experience: 20yrs in the HVAC industry with certificates and degrees.

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