HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

I Have a Rheem Split Package AC Unit. 4-ton RHLA HM4821JA.

Customer Question
I Have a Rheem...

I Have a Rheem Split Package AC Unit. 4-ton RHLA HM4821JA. Air handler blower runs continuously. No issues with thermostat or wiring. Motor runs even when control board is not connected

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Filter is new. Blower runs with thermostat totally disconnected'

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

I would like to troubleshoot, narrow down and repair if basic

Submitted: 3 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 2 hours by:
3/24/2018
HVAC Technician: hvacdave84, HVAC Technician replied 3 months ago
hvacdave84
hvacdave84, HVAC Technician
Category: HVAC
Satisfied Customers: 99
Experience: ARI and EPA certified
Verified
Hello. There are a few things to check. Have you checked to see if any of the furnaces limit switches are open? This would cause the blower to run as a safety precaution. If you check the limits and find a tripped rollout switch, evaluation by a licensed professional will be necessary as the heat exchanger could be compromised. If the heat is running ok and the blower still won’t stop it sounds as if the relay that powers the motor is failed in the closed position. If the blower is wired directly into the control board, a new board will be needed. If it is powered by a contractor, check to make sure the contractor is not stuck closed
Ask Your Own HVAC Question
Customer reply replied 3 months ago
I have been out of town and unable to check the limit switch(es). The Heating and Cooling both appear to cycle correctly. The Blower runs appropriately during those cycles but seems to operate randomly in between the heating or colling cycles. The X13 blower motor is connected directly to line voltage (230 V) and is controlled by 24 Volt from a control board.I swapped the control board with a new one and still have the same issue with the blower motor. I will have an opportunity to check the limit switches this weekend.
Customer reply replied 3 months ago
Got home early and did some testing. I was able to check the limit switches. They are closed and register 0 ohms resistance. I unplugged the heater terminal PL1 on the control board and blower fan still runs. The board is not giving 24v output to turn on fan. I disconnected the low voltage (control) wires from the control board to the X13 motor and blower still runs. I checked the low voltage taps on the X13 motor and there is 0 voltage. What other items should I check? I believe I have traced it back to the X13 motor or motor control module....
HVAC Technician: hvacdave84, HVAC Technician replied 3 months ago
If there is no 24v control input to the x13 control wiring and the motor still runs then the control module on the lead end of the motor is failing. If you are sure that the motor is an X13, there are many aftermarket options, that are made to be used in a wide array of applications. The Emerson rescue line of motors is one example (make sure you’re getting an x13 replacement) I personally have had good luck with the Mars Azure Digimotor. I believe evergreen has an x13 product as well.
Ask Your Own HVAC Question
HVAC Technician: hvacdave84, HVAC Technician replied 3 months ago
This is an X13. No other issues could be at the heart of it. If you remove control wiring completely and the motor still runs, the control module on the motor is failing.
Ask Your Own HVAC Question
HVAC Technician: hvacdave84, HVAC Technician replied 3 months ago
GE • Genteq Evergreen 3/4 HP 230 Volt Replacement X-13 Furnace Blower MotorIf you search this ^^^ you should be able to find a suitable replacement
Ask Your Own HVAC Question
Customer reply replied 3 months ago
Can the control module be repaired? Do I replace the entire control module or do I need to replace the whole motor?
HVAC Technician: hvacdave84, HVAC Technician replied 3 months ago
In order to replace the control module, you would have to contact a Rheem dealer in your area and have it ordered. The X13 replacements, as long as the HP and Voltage are compatible, would be a sufficient repair option that could possibly be more cost effective than having the OEM motor control module replaced
Ask Your Own HVAC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask hvacdave84 Your Own Question
hvacdave84
hvacdave84
hvacdave84, HVAC Technician
Category: HVAC
Satisfied Customers: 99
99 Satisfied Customers
Experience: ARI and EPA certified

hvacdave84 is online now

A new question is answered every 9 seconds

How JustAnswer works:

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

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.

JimmyBagley, 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!!!!

AlexLos 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.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, 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.

EstherWoodstock, 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.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

7,426 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,019 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
Our AC condenser went out, right in the middle of the hot
Our AC condenser went out, right in the middle of the hot summer.Our current AC models are: Rheem AC condenser 14AJM42A01 (3.5 ton) Rheem AC inside unit RHLL-HM3821JA (3 ton)Based on manufacturer (Rhe… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,426 satisfied customers
I have an American Standard/Trane TWV030B140A1 Air Handler.
I have an American Standard/Trane TWV030B140A1 Air Handler. The fan won't turn off once it starts up after flipping the breaker back on. Heat, Cold, Off positions, doesn't matter, the blower will not … read more
D.E. Anderson
D.E. Anderson
Industrial Refrigeration Service Manager
200 satisfied customers
My Ruud contractor has paired a 31/2 ton Ruud outdoor unit
My Ruud contractor has paired a 31/2 ton Ruud outdoor unit seer 16 with a 4 ton seer 16 air handler. Says ruud does not make 3 1/2 ton air seer 16 air handlers. Is this acceptable pairing? … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have rhc-tst551cmms thermostat that I'm trying to install
I have rhc-tst551cmms thermostat that I'm trying to install It has 4 terminals R,C,Data1,data 2. What wires go to data1 And data 2 spots. Hookup up to rheem 500series thanks… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I installed a rheem rhll air handler condenser shuts off
I installed a rheem rhll air handler condenser shuts off when tstat is satisfied in heat but fan continues to run. I have replaced board I pulled off the electric heat so it is not a sequencer. I have… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I am in dyer need of some help. I bought 4 split systems, 2
I am in dyer need of some help. I bought 4 split systems, 2 5 ton and 2 2 ton and I am trying to figure out what I need to wire these things. I have committed to building an indoor hitting facility fo… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,019 satisfied customers
I have an RHLA-HM4821JA air handler. The blower does not
Hi! I have an RHLA-HM4821JA air handler. The blower does not appear to be working correctly. With the panel cover off, I observed that the when the system starts, the GE x-13 motor hesitates and makes… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,942 satisfied customers
Have a Rheem 2 ton heat pump, 410a, 150psig suction, 350psig
Have a Rheem 2 ton heat pump, 410a, 150psig suction, 350psig head, outdoor temp 98, indoor temp 87, getting 78degree supply air , air handler in the attic.c ant get this unit to cool , any suggestions… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My daugt air handler ac stopped blowing, Blower works when
My daugt air handler for her ac stopped blowing, Blower works when calling for heat but wont work on AC. … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Need help diagnosing a 2013 - 4 ton Rheem Heat Pump I have a
Need help diagnosing a 2013 - 4 ton Rheem Heat Pump I have a Honeywell Thermostat TH5220D1003 - 0920 that is paired with this Rheem Heat Pump equipment: 1 13PJL48A01 Rheem 13 SEER 4 Ton Heat Pump Cond… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I got a Rheem furnace and heat pump 8 years old. I kept blowing
I got a Rheem furnace and heat pump 8 years old. I kept blowing fuses and heat wouldnt come on. Found that thermastat had a broken prong and replaced thermastat and now the furnace comes on but not he… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
i have a rheem air handler connected to a 5 ton unit outside and the fan does not turn off
i have a rheem air handler connected to a 5 ton unit outside and the fan does not turn off. There's a pool of water around the air handler and I noticed the AC has been colder than normal oer the past… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a Rheem AC unit I noticed the fan motor running all
I have a Rheem AC unit I noticed the fan motor running all day even when the thermostat is turned off. I unplugged the motor and plugged it back in but it continues to run. Is it the circuit board. I … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Rheem air handler RHLA HM4821JA at night and early morning
Rheem air handler RHLA HM4821JA at night and early morning air handler comes on without condensing unit (inside set at 78)for about five seconds and inside temp below 78 many times///noon and as outsi… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Rheem RCHJ-36A1G Air handler fan motor inop. Ckd Thetmostat
Rheem RCHJ-36A1G Air handler fan motor inop. Ckd Thetmostat and replaced. AC compressor OK . Fan will not run. Do i need motor P/N 51-101880-10 or control board? What would be the P/N of the control b… read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
I recently purchased a foreclosed home that had been vacant
I recently purchased a foreclosed home that had been vacant for over a year. About 3 months prior to my purchasing the home, the bank that owned it started paying the electriciy bill to make the home … read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
What would be a reasonable price to purchase and install a
What would be a reasonable price to purchase and install a new 4-ton, at least 40,000+ BTU air conditioner /split gas system w/ new whip, furnace, coil and condenser; 16 SEER rating at least. Include … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
My roof top natural gas heater does not ignite. It is a Rheem
My roof top natural gas heater does not ignite. It is a Rheem 3.5 ton combined unit with electric A/C which is two years out of warranty. We are out of work and can't afford an expensive repair bill s… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x