HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I have a Rheem Imperial Drum Model Number ROBC 084Qea oil furnance

Customer Question
1993. My furnance does...
I have a Rheem Imperial Drum Model Number ROBC 084Qea oil furnance 1993. My furnance does not seem to be communicating with my thermostat. The furnance stays running well past the desired temperature setting. It does not always do this and i have a brand new thermostat which seems to work fine with the AC (cool settings). I have had technicians come out 3 times and check over the furnance and they have replaced a few parts but the problem still exsists. When they are here the furnance and the thermostat work fine but Like I said there are times when the furnance just keeps running. To stop it sometimes all i have to do is open up the cover and tap the (coil 24U 50/60 HZ part # XXXXX Rodgers(NNN) NNN-NNNN101G?) Can you let me know where to begin looking or if this is a common problem with this furnance? - Jake
Submitted: 7 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 26 minutes by:
11/20/2010
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 7 years ago
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22,893
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Verified

 

Are we talking blower operation or full heat operation?

 

 

 

 

Ask Your Own HVAC Question
Customer reply replied 7 years ago
The furnance works fine from a blower and full heat operation standpoint. Both keep running even though the temperature being registered in the house is way past the temperature setting. I set the thermostat to 68 and the furnance and blower keep running even when the temp is 73
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 7 years ago

 

 

Does the oil primary have a T and T for thermostat wires?

 

 

Ask Your Own HVAC Question
Customer reply replied 7 years ago
Not sure what a T n T is for thermostat wires is?
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 7 years ago

At your furnace where the reset button is.....this box has terminals where thermostat wires attach.....that is where (2) Two, T terminals will be....Some units have different format so I wanted to verify what yours had first.

 

 

Ask Your Own HVAC Question
Customer reply replied 7 years ago
At the reset box there are two sets of two screws. From the best that I can see there are single 2 wires coming from a box were the wires from the thermostat are terminated to the reset box and terminated on screws that are side by side there. On the other set of two screws there is two single yellow wires that seem to loop back into the reset box. Hope this helps
HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 7 years ago

 

That is correct. Now for why I wanted to know....

 

There are 2 reasons for it to keep running.

 

1) something is telling it to. In this case something would have to make the thermostat terminals connect. Things like thermost, wires touching etc.

 

2) something is stuck. The switch inside the primary control gets stuck after the thermostat turns off.

 

Given your symptoms I think relay stuck since you can tap it and stop.

 

When unit will not turn off...remove one thermostat wire from one of the terminals. (not the yellow ones that go inside)...if it keeps running it is a stcuk relay in primary control which means the reset box would need replaced.

Ask Your Own HVAC Question
Customer reply replied 7 years ago

2 questions, roughly how much is a new reset box and if this does not work but I accept your answer can I get additional advice later for this same fee

HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 7 years ago

 

Depending on model $50 - $100.

 

And I never close my questions and always have follow up. Lets say you replace it a month from now....you can always come back and get follow up.

 

You will see from my feed back that I am not one to leave people hanging.

 

This may seem like simple banter, but I think every question through and provide the best answer I can....and when I am wrong, I keep moving forward.

 

If you get the model number off the primary I can be more specific on cost

BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22,893
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
Verified
BillyHvac and 87 other HVAC Specialists are ready to help you
Ask your own question now
Ask BillyHvac Your Own Question
BillyHvac
BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22,893
22,893 Satisfied Customers
Experience: Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics

BillyHvac 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

6,938 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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

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

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
Rick. 1 day. I have a taco sr506 switching board, all my
1 day. I have a taco sr506 switching board, all my thermostats ar on, but there is no red lights on the board … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a rheem classic 90 plus that has no heat, no fan
I have a rheem classic 90 plus that has no heat, no fan blowing for heat or air. The diagnostic leds are as follows flame=not lit, the next one=constant green, the next one=constant green. I have chan… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have an AO boiler with a triple aquastat,I have a three
I have an AO smith boiler with a triple aquastat,I have a three zone system and need know the correct way to connect the end switch to the system thx GA … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I am installing 22 Venstar T1700 to control my 2 Zone
I am installing 22 Venstar T1700 to control my 2 Zone hydronic system. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have to reset my furnace every couple days to get it to
I have to reset my furnace every couple days to get it to come on. The led light doesn't flash any error code. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Is the york diamond 80 compatible with a Honeywell Lyric T5
Is the york diamond 80 compatible with a Honeywell Lyric T5 wi fi thermostat? … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Thermostat question: I replaced the thermostat myself. I
thermostat question: I replaced the thermostat myself. I turned the furnace off and connected the wires myself. I can't remember exactly but one of the wires was originally connected to the wrong colo… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Trying to rewire a thermostat rth6350. What happened is a
what happened is a friend of mine disconnected the wires and doesn't remember where the wires go … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a question about my furnace. New filters recently. I
I replaced themotherboard about 3 weeks ago and disconnected the humidifier… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I came home from a 3 day trip to find that my heat is not
I came home from a 3 day trip to find that my heat is not working. I believe the problem to be the thermostat partly because it is at least 12 years old. It is a HUNTER 44100 programmable heat/cool th… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Have a 1f58-58 bought a1f58-72 do they wire the same? Now
have a 1f58-58 bought a1f58-72 do they wire the same? … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Rick, The thermostat terminals on the ZVC404 Zone Valve
Hi Rick,The thermostat terminals on the ZVC404 Zone Valve Control are marked as 24 VAC. Does this mean that when the terminals on the thermostat are closed, the circuit is completed and energized with… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have an TACO SR502 that controls 2 pumps one for zone1 for
Hello, I have an TACO SR502 that controls 2 pumps one for zone1 for Hot water loop and the other for zone2 for baseboard heat and I also have a new TACO ZVC406 that control one other pump that supply … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
My Taco SR 504 switching relay is powered up ( light is on),
My Taco SR 504 switching relay is powered up (green light is on), but none of the zones are working (red lights off). The thermostats upstairs are all brand new and working, and the digital valves see… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I had a taco sr504 that one zone was not working. I switched
I had a taco sr504 that one zone was not working. I switched thermostats from other zones , jumped out that zone, switched contactor relays etc. I called taco and they said it was probably a bad board… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
My honeywell thermostat dose not have a rh inlet only an r.
my honeywell thermostat dose not have a rh inlet only an r … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
How to wire up wilo wzc universal zone control two zone to
how to wire up wilo wzc universal zone control two zone to boiler … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Replaced old ignition control -Rodgers Model 50A50-405,
Replaced old ignition control White-Rodgers Model 50A50-405, D340035P01, CNT1309 with 50A50-405.Now I have 5 flash,then pause which represents open rollout switch. Checked rollout Switch and it is not… read more
BillyHvac
BillyHvac
Journeyman HVAC Tech
22,893 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