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I have a lennox 3ton 19 seer, got a critical alert code 11,

Customer Question
I have a lennox...

I have a lennox 3ton 19 seer

Contractor's Assistant: I'll do all I can to help. How long have you been dealing with this?

Got a critical alert code 11

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

Yes

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

6/7/2011

Submitted: 11 months ago.Category: HVAC
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Answered in 2 minutes by:
9/17/2017
HVAC Technician: Phil, Mechanical Engineer replied 11 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, I need the full model number of the outside unit if thats where the code is emanating from. in order to pull the manual on it.

If the code is coming from the thermostat I need the full model number of the furnace/air handler.

And... I need to know the outside temperature when the system failed.

We can go from there

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HVAC Technician: Phil, Mechanical Engineer replied 11 months ago

OPENING STATEMENTS

Important note about RATING my work:

I am a retired mechanical engineer and HVAC/electrical/ refrigeration and boiler contractor ... with 56 years in this business. The last 20 of those years consulting for major firms nationally..

.

All I ask is please respect me and my input by selecting the***RATING LINK***at the top of your page, that is the only way I am credited through the site. Rating does not affect your charges nor ability to refund if not satisfied.

.

If you need to be coached through a full diagnosis/repair,and wiring etc. for up to two days, and wish to be trained to use test instruments...... that goes well beyond' Just a simple Answer' of course, and goes beyond what most other experts here offer.....rate my answer so far positively.. . and I will deliver that training and coaching to you All on the same dime so to speak.

.

Lacking a positive rating I can spend days helping a person at my own expense and loose my shirt, shorts and socks on the deal.

.

Attach a close up photo of the wiring diagram glued to the inside of the blower access door and I will mark it up with trouble shooting instructions then follow up with step by step training and coaching until you have a solution.

.

Photo must be exceedingly well focused. Use the 'add files' link next to your send button to get the photo to me.

.

Phone call offers:

If you wish to accept the companies $25 phone call offer, if indeed they send you one, this will go a *lot faster, but it IS 100% optional... or we can continue here in this dialog box at no additional charge.

.

Tell me a little about your technical background and instruments on hand so that I can coach you most effectively. We can go from here.

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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
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Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

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