Question about Heating & Cooling

1 Answer

My furnace cycles too often. Do I suspect that my Honeywell digital thermostat (Model CT3500A) Smart Recovery features are faulty? How to you adjust the sensitivity? Thanks!

Posted by on

  • lilamy Oct 24, 2008

    It helps somewhat as it narrows down the causes. I don't have the instructions as I bought an existing house. No luck in finding the manual at Honeywell site even though I think the thermostat model is about 4 years old. Model CT3500A). Thank very much jasond1011.

  • Anonymous Dec 06, 2008

    I replaced my old furnace in the spring, with a 2 stage Trane XL80. I had also replaced the old 1 stage thermostat with Honeywell's RTH8500. The furnace comes on every 10 minutes, runs for 5, and the temperature holds steady at the 21 degC setpoint. The older Hunter thermostat (also electronic) did not cycle often. Although the comfort level is improved now, my natural gas consumption has gone up over same period last year, by 10+ percent. I am very disappointed, and though I'd be saving money by upgrading the entire system. Not so.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 124 Answers

Recovery has nothing to do with on off on off. you have a new digital stat that holds an exact to the degree temp a change of a half a degree can bring it on.. so stat needs to be above main return 5 feet off floor. away from any drafts , doors supplys etc. also be sure the hole in the wall is sealed . the cold air in the wall is more than enough to make stat come on . they are incredibly sensitive.an old mercury bulb stat would have a swin g of 3 or 4 degrees . so set at 75 it may heat up to 78 and stay off till temp fell to 73 so you get a longer run cycle or and longer off cycle. the new ones are on off on off keeping a perfect temp 75 exactly. thory is the heat exchanger is already hot and a quick short cycle is more efficient than being off 20 minutes and reheating the heatexchanger from scratch again. having said that if you look aT the installer set up instructions that came with the stat it may give you an option to reset or adjust the stat so it will have a one (default) two, or three degree adjustment , so 75 equals up or down three degrees on call for heat.see honeywell toll free number in their literature

Posted on Oct 24, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Coleman furnace 4322/729 model lights the pilot but won't cut in . What could be problem ? Cleared lines Complete


Gas valve not opening? Does it have the exhaust blower that pulls vacuum switch allowing burner to light?
(1) Thermostat not working? Has to complete the circuit in or gas valve to open.
(2)Can be a stuck or bad gas valve. Try tapping the side of the gas valve body while thermostat is calling for heat. Tapping,not pounding. Like lightly,yannow? don-ohio (:^)

Jan 03, 2017 | Coleman Heating & Cooling

1 Answer

We have royal red furnace to heat our home.The fan dose not stop.


Details.......does the furnace function normally otherwise? Might just be a stuck fan switch. Make sure the thermostat hasn't been set on Fan ON setting or summer air circ. on older furnaces.
Find the fan switch and tap it and see if fan quits. If it does,fan switch is bad.probably. Always make sure your air circ. filter(return air to furnace) is replaced every 3 mo. or so,too. don-ohio (:^)

Jan 03, 2017 | Royal Heating & Cooling

2 Answers

Thermostat set at 73degrees , turns on and off to frequently


Hello Jean Thomson,

There are several reasons air-conditioning could go on & off frequently.

Thermostats can be set with close degree function...

Assuming your temperature variances are of no importance
the THERMOSTAT can be adjusted to be less sensitive...

BUT BY FAR... the most common reason for rapid cycling
of the A/C are air leaks and poor insulation...

Your local UTILITY provider will likely have FREE (or very reasonable) thermal analysis - evaluation programs... wit supported contractor services to improve your INSULATION and reduce ENERGY CONSUMPTION.

Also you might need to consider that your A/C system is simply poorly engineered to keep your home at a comfortable temperature...

Again... there are SPECIALISTS who are capable of analyzing your existing structure... and recommending appropriate systems sizing to economically operate efficiently....

Nothing here for the uninformed noviciate... all highly technical.

Save money... Get a PROFESSIONAL ANALYSIS..

Hope this helps!!
Carnac the Magnificent

Jan 02, 2017 | Heating & Cooling

2 Answers

My thermostat is set on 68 degrees and it shows room temperature is 68, but the furnace still kickson, Honeywell said it has a 1 degree difference. so what's the problem then?


Yes there is a one degree tolerance, in fact my heater just kicked on and it is set to 67 and the inside temperature reads 67. It is also a Honeywell.

Dec 28, 2016 | Heating & Cooling

2 Answers

It is 9 degrees outside and my duo therm furnace is blowing cold air


I hope you have fixed it by now. Probably was the limit switch? don-ohio

Dec 18, 2016 | Heating & Cooling

1 Answer

Is it cost effective to replace draft inducer blower on 22 year old furnace?


Depends on the cost to repair. Probably a 22 year old furnace is not very efficient also. Take every thing into consideration.
If it still works it may work for a while but you don't want a break down in the middle of winter.

Nov 07, 2014 | Heating & Cooling

1 Answer

My termost set to a/c, the fan auto, blow very well, but when I switch to heat and the fan auto, doesn't work, but if I put fan on work why?


the thermostat says to call for heat buildup in the work if its not cold enough the thermostat won't call for heat and I won't go on but when it gets cold and the thermostat set to the temperature you want or hire someone that doesn't cycle

Oct 12, 2014 | Heating & Cooling

1 Answer

I have a Coleman Evcon electric furnace, the blower fan runs constantly and I have to shut the breaker off inside the front cover to turn it off. The switch is on auto and it runs even when the thermostat...


It could be a thermostat problem. Also it will seem to run constantly as it tries to heat and one of the elements are working which could be a sequencer problem.

Nov 28, 2013 | Heating & Cooling

2 Answers

Flashing re co


Re Co stands for Recovery Mode. That means if you have programed your thermostat to be at say 72° at 5:00 then it should kick on in Recovery Mode several minutes before 5 in order to reach that temperature. This is normal and doesn't indicate that something is wrong, just that your thermostat is trying to reach or recover the programed temperature.

Feb 08, 2008 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

5,837 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2112 Answers

Dan Webster
Dan Webster

Level 3 Expert

8205 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...