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airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 7748
Experience:  Furnace, A/C and heat pump specialist.
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How much is service. I have a Lennox. Code 4+3

Customer Question

How much is service. I have a Lennox. Code 4+3
Submitted: 10 months ago.
Category: HVAC
Expert:  airheatman replied 10 months ago.

What is model on furnace?

Customer: replied 10 months ago.
Lennox g61mpv
Expert:  airheatman replied 10 months ago.

Let's turn power off to furnace to reset board.Then back on and call for heat. Tell me how far in sequence it goes and first code we get.

The normal sequence of operation:

Inducer vent motor comes on

Pressure switch closes

Igniter lights

Burners ignite

Main circulating blower comes on

Customer: replied 10 months ago.
All that happens. Eventually flame goes out and air keeps blowing. Red light blinks 4x then 3x after flame goes out
Expert:  airheatman replied 10 months ago.

We should not get the 4/3 error unit furnace has started and failed at least 3 consecutive times.

Do you get any other codes before that on first failure?

Customer: replied 10 months ago.
Just 1 blink
Expert:  airheatman replied 10 months ago.

Have you tried cleaning flame senser? If not lets try that

Customer: replied 10 months ago.
Can you text instead of email.(###) ###-####
Expert:  airheatman replied 10 months ago.

Sorry I am unable to text.The website does offer phone call service for an additional fee of 18.00.If you select the additional service offer, you may get a different technician.Accepting the offer automatically charges you for the question as well as the additional 18.00 phone call fee. We can work here until finished at no additional fee.If you do want a phone call and don't mind the extra fees let me know ,otherwise we will continue here

Customer: replied 10 months ago.
Email is good
Expert:  airheatman replied 10 months ago.

Do you know where flame senser is and how to clean it?

Customer: replied 10 months ago.
No
Customer: replied 10 months ago.
I have to go out. Can I try later
Expert:  airheatman replied 10 months ago.

Yes, That is fine, It will be a single steel rod with one wire attached and stick in front of farthest burner from ignitor.You can clean it using a dollar bill or fine sand cloth.h

Customer: replied 10 months ago.
Cleaned it. Flame still not staying on
Expert:  airheatman replied 10 months ago.

About to leave for the night.Will open to other experts so you don't have to wait.

Expert:  airheatman replied 10 months ago.

Now you have both an igniter and a flame sensor.as what you cleaned a single rod with one wire?

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