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I have a luxair furnace trouble. Clean put new one in it…

Customer Question
Hello i have a...

Hello i have a luxair furnace trouble

Contractor's Assistant: Did you check the furnace's filters?

Clean put new one in it shows two red flashes

Contractor's Assistant: Do you plan on doing the work yourself?

I was hoping to ys yes

Contractor's Assistant: Anything else we should know to help you best?

I already changed the pressure valves also the pressure reducer also the moisture pan

Submitted: 4 months ago.Category: HVAC
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Answered in 2 minutes by:
3/29/2018
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 23,151
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Verified

Hello,

depending on age the 2 blinks could mean a couple different things.

Does the legend on back door of the blower section state what the 2 blinks represent?

Also please disregard computer generated phone offer as that is not currently available

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Customer reply replied 4 months ago
when i googled
it it is a pressure switch issue
Customer reply replied 4 months ago
text is good
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

They used it two different ways....pressure switch stuck closed and also stuck open.

Is this the switch you already replaced?

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Customer reply replied 4 months ago
i replaced both -40 and also the -90
Customer reply replied 4 months ago
it worked for awhile
Customer reply replied 4 months ago
then i replaced the pressure reducer and it worked for awhile again
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

Thank you...is this a 90% efficient furnace with plastic vent pipes?

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Customer reply replied 4 months ago
3 weeks ago i replaced the moisture pan and it worked till todayyes it is 90 some % and direct vent pvc pipes to the outside
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

Ok do you have a shop vacuum?

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HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

purge the furnace drain at end point applying suction to the furnace.

I am thinking we are not draining as well as it should....make sure plastic pipes slope back toward furnace 1/4" per foot with no sags or pockets. Make sure the condensate pan and trap are not junked up....suck everything out of furnace and tell me if it starts afterwards

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Customer reply replied 4 months ago
ok i try it
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

standing by

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Customer reply replied 4 months ago
well the reservoir was full i emptied it and suck hose out and no start
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

Did the pressure switches get water logged? Moisture in the tubing?

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Customer reply replied 4 months ago
anything possible i guess
i believe all water was in
Customer reply replied 4 months ago
was in the holding tank
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

do you have 2 plastic pipes?..one intake and one exhaust?

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HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

we want to remove the intake and try to start furnace

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Customer reply replied 4 months ago
ok
Customer reply replied 4 months ago
nothing
the reducer motor is running all the time
with thermostat calling for heat and also when its not calling for heat
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

thats a tripped safety...either limit or flame rollout

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Customer reply replied 4 months ago
what do i do with that
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 4 months ago

Can you take a pic of the furnace with doors off and post here?

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