Category: Honeywell thermostat span setting

Honeywell thermostat span setting

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Honeywell RTH6360D 5-2 Day Programmable Thermostat

New Posts. Today's Posts. Community Member List. Forum Actions Mark Forums Read. Quick Links View Forum Leaders. Any way to adjust temperature "span" on Honeywell thermostats?

Thread Tools. I had a Honeywell thermostat on my furnace. The span was automatically set for a very narrow range. I feel this is not good for a furnace. I took the thermostat apart, but could not find anything to adjust. I then installed a Hunter thermostat which has the option to adjust.

Isn't there anything that can be adjusted on a Honeywell? Are all Honeywell's built that way? View Public Profile. Find all posts by James Received 23 Votes on 21 Posts.Key: AdminGlobal ModMod. Print Thread. I have a Honeywell PRO which cycles on one degree or less temp change. In fact, the room temp does not change when the heater starts up again.

This happens on min intervals in cold weather. According to the manual, there is no adjustment. I would like to be able to adjust up to a two degree differential. On another post, someone mentioned the electronic honeywell is non-adjustable. I have two of these at home, but they are not programmable. However, they may make a similar one that is.

They work well and do have adjustable range. You would need to verify the compatibility. Her Handyman P. Everyone seems normal until you get to know them! Does anyone have a positive experience with a programmable tstat with adjustable differential that is compatible with the Rheem system I have? It is a Honeywell THD. I emailed Honeywell customer service and they told me this model does not have an adjustable differential and further more they do not make a digital programmable tstat which can be adjusted.

I also confirmed in the setup manual there are no instructions for this adjustment. So, I would like to use one for the upstairs which is adjustable. The upstairs is seldom used so that is another reason to use one with a larger range to reduce the cycling.

Terry, Thanks for the info. My thermostat does have an adjustable cycle rate. It is now set at 5 cph. I am confused about the relationship of the differential temp and the cph.

Can you explain how they interact? Looks like I just need to reduce the cph to 3 or 4. Last winter when the temp was in the teens, the heater seemed to cycle more than 5 times per hour? Talked to Honeywell tech support and was told that I would not reduce the heat cycle rate by changing from 5 cph to 3 or 4 cph. He confirmed that they do not make a programmable tstat where the differential can be adjusted.

My option would be to go back to the mechanical tstat where the differential could be 2 or 3 degrees. I am not concerned about reducing my usage, only reducing the number of heat cycles. Print Thread Switch to Threaded Mode. Default Style ubbthreads-dark ubbthreads stock. Powered by UBB. Page Time: 0. Server Time: UTC. Who's Online Now. Welcome Newcomers. Only registered users may post in our forums.

Please register and join our community!Remember Me? Page 1 of 2 1 2 Last Jump to page: Results 1 to 13 of Thread: Honeywell Thermostat Cycle Time.

Thread Tools Show Printable Version. Installed a Honeywell programmable thermostat. It's driving me crazy since the furnace for the second floor is in the attic, and it's loud. Went to the FAQ's at Honeywell and it states: "cycle rate is the ideal number of times a heating system will run, in an hour, to maintain temperature within one degree.

For instance, gas or oil forced air systems have a recommended cycle rate of 6. This breaks down to about 5 minutes on and 5 minutes off. Again, the actual on and off time of the heating system will vary as the load on the heating system varies. Seems like a lot to me. Some times it wouldn't run the oil burner, forced hot air ,long enough for the limit switch to even start the blower motor then shut off satisfied. I installed a good quality White Rodgers t-stat and never had another cycling problem.

Quality has gone down hill real fast in the last few years. You can change the cycle per hour. Look in the owners manaul. I would set it to 3 cycle per hour. You may have a Honeywell Chronotherm thermostat that has 2 cycling settings: 6 cycles per hour and 3 cycles per hour. I downloaded installation instructions from Honeywell's website and discovered how to set it to 3 cycles per hour.

Thats why i prefer Robertshaws SaverStat modelover Honneywell. I have had bad experiences with Honeywell thermostats, especially the Magic Stat like mentioned above as a cheap Menards and Home Depot thermostat.

I have installed thousands of White Rodgers thermostats and have had the least callbacks from them and they are the longest lasting. Check out the 1F 86 series. Best bang for the buck. Stay away from Honeywell Robertshaw is not bad either. Thanks for the advice.Forgot your Password? We welcome your comments and suggestions. All information is provided "AS IS.

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Thermostat cycles per hour #1

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honeywell thermostat span setting

Today's Posts. Community Member List. Forum Actions Mark Forums Read. Quick Links View Forum Leaders. Honeywell Thermo--no swing?? Thread Tools. Received 2 Votes on 2 Posts. I recently installed a Honeywell programmable thermostat and was surprised to find that it apparently does not have a temperature swing setting.

Unfortunately, this causes the system to cycle about every 5 minutes, which I'm afraid is going to prematurely wear out my unit my relatively old unit. Why would Honeywell design such a thermo? View Public Profile. Find all posts by mossman. Received 17 Votes on 14 Posts.

What model stat do you have? What type of heat do you have? Find all posts by Houston Honeywell RTH Says on page two that it keeps the temperature within 1 degree of the set point. Not a very desirable feature if you ask me. Why not let the consumer configure the thermo as they choose?

Guess I'll be buying a Ritetemp or a Hunter thermo with my Lowe's gift card.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. My home furnace is currently controlled by a programmable Honeywell thermostat, but it regularly thrashes the furnace by turning the furnace on for just ten or twenty seconds.

It seems that the thermostat will register a one-degree drop in temperature for a few seconds, turning the furnace on, but then switch back up to the previous temperature a few seconds later, turning the furnace off again. Presumably, air currents near the thermostat produce rapid swings in temperature of around one degree. After some investigation online, it seem that what I need is a thermostat that supports "variable swing" or " deadband " -- that is, heat to a given temperature e.

Apparently Honeywell thermostats do not support this. Which thermostats allow a temperature range to be programmed? I don't want to spend hundreds of dollars on a smart thermostat; a simple and cheap programmable thermostat would be ideal. Looks like many Honeywell thermostats have a "cycles per hour" setting instead of a deadband setting.

Not exactly the same thing but roughly analogous. If your thermostat has that setting you could try changing it. But if the cycle time is 10 secondsI'm not sure the deadband is really the problem Do you have a hot air vent blowing directly on the thermostat or something?

Or possibly some other problem with the furnace not lighting? Defective thermostat certainly seems like the most likely option here, so probably any reasonable programmable thermosat will work more correctly than this, no need for fancy and pricy "smarts. A simpler one would be to replace with a more functionally correct 'stat.

Even the old mercury bimetal stats had sufficient hysteresis to keep this sort of thrashing from happening.

It's also possible that your current 'stat does have adjustments that are mis-adjusted which would help with this. Whether or not you could find documentation on them I don't know, and you have not mentioned a model number. If you pop it off the wall and have a look at the back you might see something, or you might get lucky if you look the model number up online.

Often older stats will have somewhat obfusticated terminology intended to keep you calling your heating guy rather than adjusting it yourself. If your heating guy wasn't too bright this could backfire after all, he knew how to adjust a mercury 'stat, so why learn anything new? Followed by the "newfangled junk" not working, just as he predicted while throwing the directions in the trash.

I have the same problem. So I called Honeywell. Their answer: build a custom thermostat that has an "anticipator circuit", with hysteresis like the old Mercury thermostat. I did a test. I had the same problem with a Honeywell thermostat in my old apartment.

honeywell thermostat span setting

It was located by the door and the temperature at that location would change by a degree frequently, which was a major problem because my forced air heat was very loud.

I spoke to Honeywell and they do not make products with variable swing, so I went to a different company. It has a variable swing that can go between 0. This worked for me and I believe Lux makes other thermostats with variable swing so check out their models. I ended up not liking this thermostat because each day has 4 different periods temperature settings, and everyday is programmable.

If you want to change the weekday temperature, you have to sort through 28 different periods and adjust 5 of them. Works for people that need to adjust each day, but this was overkill for my needs.Thermostats with adjustable cycle rates are something any home owner can install to lower power cost and help an HVAC system last longer.

All thermostats have a set temperature that will turn on and off a heating and cooling system. It is also sometimes referred to as the cycle rate since it is the cycle that a unit such as an air conditioner turns off and on. When HVAC units are turned on and off constantly it takes a toll on the equipment leading to parts wearing out and needing to be replaced.

A unit that cycles often can also lead to larger electric bills.

Hunter 44110 Owner's Manual

Why is there Higher Electricity Cost? When an air conditioner first turns on is when it has the biggest power consumption. This is the reason that short cycles can run up a power bill. For example, an air conditioner must pump refrigerant through a cooling system which takes more work at the start then it does after it has been running.

Your current thermostat may be capable of changing the cycle rate which can be seen in its manual. Adjustable Cycle Rate Differential Thermostats. It can be set from 1 degree too as much as 3 degrees in half-degree steps. It also has a 5-minute minimum compressor off-time which is great when power is interrupted as too not damage the compressor.

The temp inside is set to 75 degrees in the summer. This unit runs for 45 minutes, turns off for 5 minutes the back on again. We are being told by the installer that this is normal running time for these new energy efficient units. Is this normal? We have a 3 ton unit for a sq ft house.

So, how do we remove or turn-off the 1 degree differential to keep the temp at what i set, not something different from what i set?


The thermostat that the installer provided is a honeywell T6pro programmable thermostat. The problem is that the furnace cycles on for 5 minutes and off for 15 minutes day and nite. The installer turned off the program which supposedly senses the room temperature change before it actually goes down.

He says this cannot be changed. Any suggestions as to what would be a sutable replacement to use. Our old thermostat 12yrs old would be set at 70 degrees and fire u[p when temp dropped to 69 and run til it reached Any help would be appreciated.

honeywell thermostat span setting

Hope this helps. Differential 1 to3 F. I leave in Winston Salem NC — often very humid in the summer. Will the Fast cycle be better at lowering the RH than the other Cycles? No the faster cycle will not allow enough air to be dehumidified during the process. So longer cycles will greatly accomplish more work than shorter cycles. The difference is a degree offset of the desired temperature.InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

We explain how to test the heat anticipator on a thermostat, and we describe the conditions necessary for a heat anticipator on a room thermostat to work properly in the first place. We also explain the difference between the job of the thermostat heat anticipator and the differential settings on a heating system aquastat or similar control.

The purpose of a thermostat heat anticipator is to "de-sensitize" the thermostat so that when actual room temperature is hovering close to the set temperature on the thermostat, the thermostat switch won't keep switching the air conditioner or heating system on and off too often - which can damage the equipment. Properly adjusted a heat anticipator also prevents the room from getting warmer than the thermostat set temperature, and it prevents the heat from shutting off before the room has reached the thermostat set temperature.

In our photo you can see our pointer hovering over fine nichrome wire wound around a triangular piece of plastic forming a variable heating element and you can see at center of the photo a flat copper arm which can be moved to slide a contact to different positions along the wound variable resistor. Behind the pointer you can see a silver scale with different amp readings which are explained below.

Inserting a small tool or pencil point into the open copper triangle allows sliding the antipator lower towards higher or lower numbers.

As you'll read in these articles, other thermostat heat anticipators may use different ranges of Amps and many modern digital and programmable thermostats don't use a heat anticipator at all. If you click to enlarge the photo above you can see the amperage level to which this heat anticipator had been set when we took this picture. Adjusting the anticipator up or down to higher or lower Amps numbers will lengthen or shorten the heat-on or cooling-on cycle. Watch out : unless you are having a problem with the thermostat's behaviour, don't fool with the heat exchanger - leave it as it was set by the installer.

But if your heating system is oscillating or "seeking" and flipping the heat or air conditioner on and off when room temperature gets close to the thermostat set temperature. THEN yes - the heat anticipator might enjoy being adjusted more properly and you might enjoy the result. This warms up the thermostat's room temperature sensor and therefore tells the thermostat the room is up to set temperature earliest.

But look again more-closely at that arrow inside our red circle. It is pointing to the left towards higher numbers on the scale. At higher numbers the heat anticipator draws less current so the little heating wire heats up less so the heating system will run longer. Take a closer look at the flat-wound nichrome wire heat anticipator and the path of current flow. When the pointer is towards the right - lower - towards the 0. Jaffe When the pointer is moved towards the left - higher - towards the 1.

A less-confusing illustration of a heat anticipator is this SlantFin thermostat - actually manufactured by Honeywell. Rather than a wind of wire around a triangular carrier as inthe T87 above the SlantFin thermostat heat antipator is a single strand of nichrome wire is bent into a circular shape.

My system cycles too fast (or slow). What should I do?

At the lower shorter heat-on end of the scale is. Current flow is through the rivet in the center of the metal pointer, along the length of the metal pointer to its point of contact on the nichrome wire, and then through the nichrome wire to that solder blob that connects the.

The longest heating cycle or heat-on at this thermostat will at the 0. The thermostat's bimetalic spring room temperature sensor behind the white dial won't be getting much extra warmth from the heat anticipator. The shortest heating cycle or heat-on time at this SlantFin thermostat should be at the 0.

Watch out : on most heat anticipators there will be both an Amps Scale initially set to match the measured amperage of the thermostat circuit AND an arrow telling you which way to move the pointer for a longer heat-on cycle.

Don't simply trust "left or right" on your thermostat - read the scale and notice the arrow. Depending on your model thermostat and where the heat anticipator is found, left and right or up and down might be reversed from the images here, and some of the thermostat heat anticipators we examined have only a numeric scale, no arrows, so it's important to follow the manufacturer's instructions. Below we provide specific heat anticipator setting recommendations as well as a description of which way to move the heat anticipator lever to change the thermostat's behavior to address room temperature overshoot.

You will see that Honeywell's own instructions contradict one another depending on the thermostat model. If your heating system seems to be working OK, without excessive burner on-off cycling and without troubling room temperature overshoot, leave the heat anticipator alone.

If however you are an installer and want to precisely set up the heat anticipator on a thermostat if your thermostat has this featurethere are three ways you can choose the initial Amps setting. The initial settings are intended simply to make sure that we don't send too much or too little current amps through the little heating coil or wire that comprises the heat anticipator.

Later we can fine-tune the heat anticipator by setting it further up or down if the room temperature at the end of the heat-on cycle is overshooting heat is on too long or under-shooting heat is not on long enough the thermostat setting.

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