HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I'm replacing a Simple Comfort 2200 Thermostat with a

Customer Question
Honeywell RTHL3550. I have a...
I'm replacing a Simple Comfort 2200 Thermostat with a Honeywell RTHL3550. I have a Heat Pump with backup heat strips. The Simple Comfort has the 24v wires installed.
The wires on the existing SC2200 are
C - Blue Wire
L - No wire
R - Red
B - No Wire
O - Orange
W2 - White
G - Green
E - Black Jumper wire to ?
Y1 - Yellow
Y2 - No Wire
I have wired the Honeywell according to the instructions. It says not to use wire C. If batteries run out will system still run? also the E wire was jumped to something. I did not see this before I unhooked it I thought it was coming from the wall but when I removed the old plate along came the e wire not connected to anything. Where should it go? I am getting heat but it does not seem to be as hot as before. The outside unit is coming on and the blower comes on at the same exact time. The entire system seems to run constantly like it cant keep up its 40 outside and I have thermostat set to 68 inside. It gets to 68 but stays right there and does not shut off.
Submitted: 1 year ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 8 minutes by:
1/12/2016
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago
Brian HVAC Guy
Brian HVAC Guy, HVAC Technician
Category: HVAC
Satisfied Customers: 953
Experience: I have been an HVAC/R mechanic/technician for 30+ years.
Verified

Hi I'm Brian and I'm here to help!

That model Honeywell will 'steal' some power from the terminals of components that are not being called to run but it is important to change the batteries once a year anyway.

Now for your wiring. Just to confirm, you had 6 wires connected to your old stat and now since you capped and taped the blue wire you only have 5 connected to the Honeywell, correct?

Ask Your Own HVAC Question
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

5 wires from inside the cable coming out of the wall that is...?

Ask Your Own HVAC Question
Customer reply replied 1 year ago
that is correct 5 wires used
Customer reply replied 1 year ago
Sorry it took so long I never received an email or text or anything that you replied to me
Customer reply replied 1 year ago
Are you still there?
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

No worries here.

As long as the wire that was on W2 is connected to Aux on the Honeywell and you have set the installer set up to Heat pump with auxiliary heat you should be getting all the heat you were with the old stat.

FYI: you should put in a little jumper from Aux to E if they are separate terminals on your new Honeywell (some of that model had separate Aux and E and some had a combined Aux/E terminal).

Is your outdoor unit pumping out freezing cold air? Is there an extra breaker in your main panel or air handler disconnect for an additional bank of electric heat that may be tripped? Perhaps you need to have it serviced and get the refrigerant level checked and auxiliary heat amperage checked.

Let me know if you have further questions on this subject. Otherwise, please remember to rate before leaving (3 stars or higher please!). Bonuses are always appreciated! Thanks for allowing me to help and thanks for using Just Answer!

Thank you,
Brian

Ask Your Own HVAC Question
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

Yeah, still here. I had my own computer issues when you were having yours :P I typed all that once then lost it somehow! Sorry it took so long...

Ask Your Own HVAC Question
Customer reply replied 1 year ago
the new thermostat has aux and e combined, So no jumper anywhere?. Yes there is a separate breaker for heat strips. It is not tripped. Why does the outside unit and inside blower never shut off? I can manually turn the thermostat below the existing room temp and it will turn off but when it restarts it will not turn off the blower or outside unit. It acts like it turns off the heat strips but not the outside unit or the blower? The keep on running.
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

The only jumper should be between R and Rc and it should have been a factory jumper.

The symptoms are behaving like your heat pump reached it's balance point which is where your home is losing slightly more heat than the heat pump alone can bring back into the home. At that point the heat pump will run all the time and the aux heat will cycle. If that is abnormal for your home compared to previous years for the temperature currently outside then it sounds like you heat pump has lost some capacity either through dirty coils, loss of refrigerant or your home has lost some sealing and/or insulating qualities and you're losing too much heat to the outdoors. Your thermostat is wired correctly so that's not the issue.

Ask Your Own HVAC Question
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

I did have another thought... If you didn't plug the hole in the wall where your wires come through to the thermostat, it could be sensing some cold air in the wall behind and that will throw the temperature sensor off. It's also possible there is a difference in calibration between the two thermostats (very likely there is) and that could be causing this too. Honeywell thermostats are typically very accurate but you may want to check the temperature indoors and make sure the new stat isn't over-heating the space.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
Hmmmm Interesting if I turn up the thermostat to 70 it gets there. But wont shut off the outside unit or the inside blower. If i manually turn it down to 66 it will shut off everything and eventually fall below that temperature in the house then it will turn on and keep it at 66 but again it wont turn off the outside unit or the inside blower and will hold it at 66 while everything is constantly running. yes the factory jumper on rc is in place. Where do you suppose they had that e wire jumped to on the old thermostat?
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

I would guess that jumper may have been for a light for the emergency or auxiliary heat. That was pretty common in older heat pump thermostats.

Based on your findings, I would say your heat pump has lost some efficiency and is not running up to snuff. I would have the refrigerant checked at the very least.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
ok I can do that but in the end the unit will keep the house at 75 if I set it to do that. It just wont shut off the blower or the outside unit once it reaches the thermostat setting it is like it will just turn off the heating unit and cycle that as needed to maintain the temperature setting but will not turn off the blower or the ouside unit.
HVAC Technician: Brian HVAC Guy, HVAC Technician replied 1 year ago

That means your heat pump is supplying either exactly at or slightly below the amount of heat your home is losing. That's why when the heat pump runs without the aid of any electric auxiliary heat, it never shuts off. The heat pump is doing it's best to maintain and that's all it can do. It doesn't have enough capacity at the moment to heat your home to the point where the thermostat will satisfy and turn everything off. That's the 'balance point' I referred to earlier.

Ask Your Own HVAC Question
Ask Brian HVAC Guy Your Own Question
Brian HVAC Guy
Brian HVAC Guy
Brian HVAC Guy, HVAC Technician
Category: HVAC
Satisfied Customers: 953
953 Satisfied Customers
Experience: I have been an HVAC/R mechanic/technician for 30+ years.

Brian HVAC Guy 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

6,730 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
Thermostat is set to cool, outside unit is running but
thermostat is set to cool, outside unit is running but inside blowing hot air … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Can you answer a question about a thermostat setting on a.
Can you answer a question about a thermostat setting on a. Vive Box? … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
With my thermostat set to auto for heating it will not come
With my thermostat set to auto for heating it will not come on nor will it get warm. It Will come on if I place to the fan position but again will not get warm. If i set it to cooling the thermostat w… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Came in yesterday ho temp 93 degress gibsob thermostat set
came in yesterday ho temp 93 degress gibsob thermostat set at 72 turned unit off then this morning turned heat on came on and was heating could this be bad thermostat … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
We have a Carrier A/C with Carrier TP-PRH01 thermostat. Set
We have a Carrier A/C with Carrier TP-PRH01 thermostat. Set on hold, auto, cooling.75 dgr. A/C will run for a while and go dark.Cooling stops. eventually it will light up and cooling will begin and wi… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Heat not working. Thermostat set correctly. I can't find a
thermostat set correctly. I can't find a location where a filter would even go. … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
How do I re-program my thermostat settings? I pushed the
i pushed the wrong buttons and now I do not know how to reset it … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Hvac- my AC is not kicking on. Rodgers brand thermostat. Set
Hvac- my AC is not kicking on. White Rodgers brand thermostat. Set on cool with fan on auto. Inside it's 80 and the thermostat is set on 73. I've been away a week and came home to no AC. What can I do… read more
HvacmanSean
HvacmanSean
Owner
HVAC
219 satisfied customers
I have a Lennox G40UH(X) HVAC system my thermostat setting
Hi.. i have a Lennox G40UH(X) HVAC system my thermostat setting is messed up.. Element Thermostat and it asking what type f equipment is this? … read more
Michael Ferryman
Michael Ferryman
82 satisfied customers
No cold air. Filter changed last week thermostat set to cool
Filter changed last week thermostat set to cool and temperature … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Having trouble getting the thermostat set. I can get the
having trouble getting the thermostat set. I can get the time, and date, but I can't get the temp. to stay where I set it … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,090 satisfied customers
I am trying to set the thermostat settings (Honeywell
I am trying to set the thermostat settings (Honeywell RTH7600 series) with a Trane TWE036P 130B0. What type of system is this to choose the correct system type for auto setting - heat/cool with centra… read more
travis webb
travis webb
tech.
2,159 satisfied customers
Older Carrier HVAC. When heats up to thermostat set temp
Older Carrier HVAC. When heats up to thermostat set temp will shut off and then the fan will come back on for a short time. … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
The blower motor continues to run, with the thermostat set
The blower motor continues to run, with the thermostat set on auto and when compressor shuts down. I replaced the fan motor relay, and still no change.… read more
Dales-Electronic
Dales-Electronic
1,028 satisfied customers
Thermostat set at 81F. Humidity in house 45% and house
Thermostat set at 81F. Humidity in house 45% and house temperature is now 89F. A/C repairman has replaced compressor and topped off the freon. Tells me there is nothing else that can be done. Can you … read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
Moved in to house today, thermostat set at 72, working fine
Moved in to house today, thermostat set at 72, working fine until lunchtime, all doors were open for movers so house heated up. Didn't touch thermostat. AC failed after lunchtime, fans working, no col… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I have a honeywell thermostat set in cool mode. I have had
Hello, I have a honeywell thermostat set in cool mode. I have had it for a couple of years and it has worked great. It is now stating it is in recovery mode and blowing hot air.… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
I have the thermostat set in the "off" position and the
I have the thermostat set in the "off" position and the outside unit and air handler continue to run and temperature in house is 2 degrees below the set point.… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 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