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I have a keep rite furnace that stopped working - 4

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flashes-first now 7...
I have a keep rite furnace that stopped working - 4 flashes-first now 7
Submitted: 2 years ago.Category: HVAC
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Answered in 3 minutes by:
1/24/2016
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago
Kcrand36
Kcrand36, HVAC Mechanic
Category: HVAC
Satisfied Customers: 80
Experience: Owner at Advantage Repair
Verified

Good Morning. I am Kevin, one of the tech's here on JA.

Can I get the model number of your furnace?

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Customer reply replied 2 years ago
It's a keep rite can't see model
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

you should find that label in the burner compartment

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Customer reply replied 2 years ago
There is a model no on the panel 330713-101
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

there should be a letter, number then three letters. such as g9mae,n9mse.

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Customer reply replied 2 years ago
There is c9mvx10020a on a yellow label
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

is there a pattern with short flashes, followed by a pattern of long flashes? If so, can you read those?

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Customer reply replied 2 years ago
It is 4 flashes
Customer reply replied 2 years ago
Which says limit or roll out switch open
Customer reply replied 2 years ago
The furnace does light but after about 5 mins this error (4 flashes) and then shuts off
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

ok, in the burner compartment, with the service switch to the furnace shut off, I want you to find a small device with two wires connected to it. There may be two of these, they are usually located "just above the burners" where you can see flame. In between these two wires maybe a reset if it is a manual reset. See if you can locate these. I cannot tell you much without a good model number, the c9, doesn't show me anything either.

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Customer reply replied 2 years ago
Found one sensor above right of burners and one similar to the left and below burners
Customer reply replied 2 years ago
Seems to some sort of switch between wires -pressed that
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

did you get a click or anything when you depress the button in the center between the wires?

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Customer reply replied 2 years ago
Also still looking for model no inside- nothing-have the manual but appears to be generic for *9m models
Customer reply replied 2 years ago
No click I didn't force. It - but no spring. Action
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

have you retried the furnace?

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Customer reply replied 2 years ago
I can see exhaust fumes going outside
Customer reply replied 2 years ago
Just trying furnace, again
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

so we have ignition?

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Customer reply replied 2 years ago
but will have to see if it stays
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

have you had very high winds?

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Customer reply replied 2 years ago
Ok same deal - stopped with 4 blinks
Customer reply replied 2 years ago
No
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

is your blower running at all?

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Customer reply replied 2 years ago
but it stops
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

do you have a "fan on switch" on the thermostat?

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Customer reply replied 2 years ago
set to auto
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

turn to on, and allow to run, does the blower continue to run without any problem?

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Customer reply replied 2 years ago
How do I know that??
Customer reply replied 2 years ago
Not hearing anything
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

do you have air conditioning as well?

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HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

ok, with the fan switch on the thermostat in the "on" position, you should have air blowing from the vent's.

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Customer reply replied 2 years ago
Don't seem to getting anything
Customer reply replied 2 years ago
Also turn ac on with thermostat set to lower temp and nothing happened
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

ok, this could be your problem. We need to go to the furnace now. problem is in the furnace, most likely in the blower circuit.

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Customer reply replied 2 years ago
Ok
Customer reply replied 2 years ago
There now
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

do you have a service switch on the side of the furnace?

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Customer reply replied 2 years ago
I have turned it off
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

great, remove bottom panel...........

accessing the blower compartment

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Customer reply replied 2 years ago
Done
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

carefully, place your hand near the motor (follow the wires going to the blower motor), if you start feeling heat, don't get any closer, but if you don't see if you can touch the motor...... is it hot?

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Customer reply replied 2 years ago
Cold
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

then now we need a volt meter to test....... do you have one or do you have a friend that has one, and knows how to use?

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Customer reply replied 2 years ago
I don't have one- but this sounds like it is going territory beyond me...
HVAC Technician: Kcrand36, HVAC Mechanic replied 2 years ago

It sounds to me like you have a defective relay on your circuit board. what needs to happen on these boards, is a call for heat, (low voltage section through limit switches, high limits, pressure switches), back to the board to send power to the gas valve. All this is usually a "timed cycle", after that "timed cycle" has been reached, a relay on the board, turns "high voltage" power to the fan motor. This does not appear to be happening based on what you are telling me. The blower motor is not running. This will trip the high limit in the circuit, and never allow the home to heat, because you are not moving air over the heat exchanger.

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