How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Phil Your Own Question

Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5486
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

Braeburn 5300 moves to cool 2 and compressor never turns on.

Customer Question

Braeburn 5300 moves to cool 2 and compressor never turns on. how to turn on compressor again
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.
Welcome to just Answer!

If the fan in the outside unit where the compressor is does not run either...no compressor and no fan outside running. Then it is likely a tripped breaker for the outside AC unit in your house breaker panel, or a tripped breaker or blown fuse in the disconnect switch located on the wall next to the outside unit.

If the fan in the outside unit is running, and just the compressor is not running, then we have to look for a high pressure cut out switch on the unit... that gets more involved, Tell me a bit about your technical background and if you have a multi meter or not, we can go from there.

it is midnight in San Francisco now, I will wait up for you though, half an hour or so, If I miss you I will be back on line in 7 or 8 hours, we can go from there.

Phil
.



I hold questions open after positive ratings to allow for unlimited follow up. Please be patient though. The research & typing take time
Customer: replied 1 year ago.

found outside tripped outside breaker and when turned back on the compressor and fan engaged, immediate cool air.


Major improvement.


However, we still see cool 2 on screen vs just cool as usual for manual set


how to get back to cool from cool 2

Expert:  Phil replied 1 year ago.
Hello again,
Its on cool 2 most likely because the house is hot and high stage cooling is being called for. lets give it some time and see how it goes tomorrow morning.

The unit tripped the breaker for a reason... a very hot day will do it. especially if the outside radiator (finned section) has dirt trapped between the fins.... a bad fan motor can also get hot and go off, that will cause the breaker to trip for a wide range of reasons.


First step is to clean the condenser coil.

Such a coil will look clean.... but still be clogged with dirt... it will need cleaning for sure if you are in a rural area and the unit is older than 4 or 5 years old.

To clean:
Turn off the power to the unit tomorrow morning... then remove the service panels on the unit so that the outside fan and condenser coil are exposed... wrap the fan motor in plastic wrap and use a high pressure garden hose to squirt water *through* the coil so you can see it squirting out the other side.

Then remove the plastic from the motor and put the service panels back on and start the unit. Let me know how it goes.

Tell me how old the unit is please.

I will hold this question open for unlimited follow up after you rate my service to you so far *positively.

Thanks!
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5486
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Phil and 6 other HVAC Specialists are ready to help you
Customer: replied 1 year ago.

unit is 18 months old, just had AC serviced including fin leaf and dirt flush, this is a top of the line unit which hit all factory specs on service checkout, we had a 105 degree day here in Austin and been above 100 for the past week with more coming for the next 4-6 weeks.

Customer: replied 1 year ago.

We are back to just cool this morning. What are your thoughts on the nest learning thermostat?

Expert:  Phil replied 1 year ago.
Hello again, the NEST thermostat has proven reasonably reliable in use. That does not mean they never fail however. The chances that this is a thermostat problem are in the 1 percent range or less.... that is because the unit tripped a breaker last night, a thermostat problem will not cause that... but hot weather will.

In 105 deg F weather is it is not at all uncommon for the sun to shine on the breaker box mounted on the wall next to the unit..... then at the same time the utillity power grid for your part of the country gets over loaded and there is a 'brown out'.... a brown out is low voltage. Low voltage causes the unit to draw too many amps and that causes the breaker to trip.

That condition is also very hard on the units compressor and can burn them out.... there are after market protective devices that shut the air conditioner off in very hot weather when there is a brown out. The devices cost about $200 and labor to install is $100 or so. Maybe 2 to 5% of the air conditioners in Texas have those attached.

The chances that low voltage and a hot day are at the root of the problem in this case are close to 100%

Let me know if that makes any sense on your end or not, we can keep discussing this and various options as you need to.

Phil
Customer: replied 1 year ago.

Phil,


what do you call this protective device and what risk do we have of voiding a manufacturers warranty if we put it in a system still covered by warranty?


Fred Fox

Expert:  Phil replied 1 year ago.

Hello again,


Regarding the " voltage monitor and cut off" I mentioned, You can fit that into the unit if done properly without voiding the warranty in most cases. However this should be purchased locally, at an air conditioning and refrigeration wholesaler by the service people so that it can be properly selected and wired.

 

A home owner can make mistakes...or.... anyone seeking to void your warranty can use that as excuse to void your warranty. So it should be done professionally.

 

If your service contractor is not familiar with these devices you need another service contractor who is up to speed on these issues...

 

You can also buy a class 2 multi meter (with a 240 volt scale on it) cost about $30 and use it to check the voltage at the disconnect switch on the wall next to the condensing unit **during the time it starts on a very hot day** tell me how low the voltage dips during that attempted start attempt.. and what the voltage reads after the unit is running.. compare that voltage read to the voltage listed on the name plate of the unit.

 

Let me know the results, we can go from there if you have already rated my responses *positively. I hold questions open with no time limit in those cases.

 

 

 

 

Phil

Customer: replied 1 year ago.

Phil, the homeowner is on 2 week AT annual training with the National Guard. Will return next Monday 29 July.


Will be calling local hvac provider re your shut off option.


Fred Fox

Expert:  Phil replied 1 year ago.

Good plan, stay in touch as necessary.

Phil

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
< Last | Next >
  • http://ww2.justanswer.com/uploads/SE/ServiceTechRus/2012-6-7_2119_056.64x64.JPG gotoman for ac's Avatar

    gotoman for ac

    HVAC Technician

    Satisfied Customers:

    4657
    51 years of experience install design and repair of all makes and models of AC
  • http://ww2.justanswer.com/uploads/AL/alumalite/2012-5-10_234018_shutterstock506249951forJA500.64x64.jpg Phil's Avatar

    Phil

    Mechanical Engineer

    Satisfied Customers:

    3888
    Retired HVAC/ Electrical & Boiler contractor. Industrial
  • http://ww2.justanswer.com/uploads/skibum0101/2008-12-16_015819_just_answer.jpg Rick Mather's Avatar

    Rick Mather

    HVAC Technician

    Satisfied Customers:

    3132
    35 years experience, HVAC
  • http://ww2.justanswer.com/uploads/RY/Rygis20/2011-5-7_3143_DSC5324.64x64.JPG Matthew's Avatar

    Matthew

    HVAC Technician

    Satisfied Customers:

    1994
    14 years experience in the HVAC field of service, installation, Manual J & D calculations
  • http://ww2.justanswer.com/uploads/KE/kentguidry/2011-9-26_214316_0059.64x64.jpg Kenton Guidry's Avatar

    Kenton Guidry

    HVAC Technician

    Satisfied Customers:

    962
    12 years install/service experience.
  • http://ww2.justanswer.com/uploads/solarman1947/2009-12-13_223915_phpkKBcXq_c2PM.jpg Rick Ridley's Avatar

    Rick Ridley

    UK Heating Engineer

    Satisfied Customers:

    871
    Retired But have had 30 years on the tools, Ex CORGI
  • http://ww2.justanswer.com/uploads/Ironheadfan/2009-12-18_222416_pump_005.jpg Tom's Avatar

    Tom

    HVAC Technician

    Satisfied Customers:

    770
    16+yrs HVAC/R service. Residential Commerical Industrial