skip to main content

Heating & Air Conditioning

Thermostat wiring?

last year

Hello all.

So recently last month I just got a new furnace replaced. I've noticed that my heat comes on for about 5 minutes, turns off when it reaches the temperature that i've set it at. After 3 minutes the furnace turns on again. I find that very unusual so i decided to open the thermostat cover to see the inside. This is the current diagram.

Are the wiring correct?

thanks

Featured Answer

mike_home

last year

It is not possible to tell if the wiring is correct without knowing how the wires are connected at the furnace control board. What is the temperature setting of the thermostat? Is there a supply vent near the thermostat which could be affecting the nearby air temperature? The furnace might be too large, but that would not explain when it is cycling on again after 3 minutes.

Comments (6)

sktn77a
last year
Sounds like your system may be oversized. What make/model is it and what did it replace?
drewc cee thanked sktn77a
Related Discussions
Thermostat wire between floor joist and brace
Q
Comments (12)
What the hell! Whoever did that should be smacked upside the head! There's just no excuse for that kind of work. I would give a guy 1 chance if I saw him do something like that - he would fix it and never pull that again - or he'd be off the crew. And how does this get past any supervisor? Let me be clear, this isn't about cost/money. It costs just as much to cut a block that doesn't fit as it does to cut one that does. In fact, as you point out, the callbacks for nail pops, settling, squeaky floors, etc. should make this sort of nonsense very expensive indeed. Talk to your builder and tell them you want it fixed. I don't think you will have much luck, but tell them your going to post it all over the internet along with the builder's name. The only way this stops is if it gets too expensive to allow it to go on.
...See More
Concern about thermostat wiring
Q
Comments (3)
Are you sure the Honeywell 9000 series are battery powered? I looked at the data sheet and I don't see a battery option. Battery powered WiFi thermostats are not common but they do exist. The THV1000DV is not a WiFi thermostat and does have a battery power option. If a third wire is available, then it should not be difficult to connect it to a common ground at the the zone controller. I see no reason this was not done other than being too lazy to connect a wire.
...See More
New thermostat wiring for a Weil-McClain EG35W SPDN boiler
Q
Comments (2)
In a two wire thermostat which is controlling heat only, the connections are 24 V power (R) and heat (W). When the thermostat calls for heat, the W terminal is energized to 24 V. You have to trace the red and white wires to seen how they are connected in the boiler. I would think the red wire is the R connection, and the white wire is the W connection, but that is not guaranteed. The terminals in the picture make no sense since nothing is connected to W, and there is a connection to Y which is normally used for cooling. I am not sure the purpose of this connector. Do you have an AC controlled by another thermostat? Does the Honeywell thermostat you purchased have WiFi? If it goes then you need a ground connection. There should be a ground on the furnace control board. Once you find it you will have to run a wire up to the thermostat.
...See More
Old Honeywell Oil furnace Thermostat wiring
Q
Comments (8)
Oil burners are sometimes installed with a fused safety switch. Your old switch seems to be a typical single pole toggle switch. If the wiring is 14 gauge then a 15 A toggle switch should be fine. I suppose it failed from old age. It is probably only flipped once a year. Oil burners installed in basements may sometimes have a power switch at the top of the stairs. If you have one then check it for problems. I am glad to hear you found the faulty connection. That type of problem can be very frustrating. Are you really sure you need a humidifier? Have you measured the humidity level? Humidifiers need regular cleaning and maintenance. It is always best to solve the low humidity problem in other ways. Outside air infiltration is the biggest cause in the winter. I suggest sealing up windows and doors wherever possible.
...See More
drewc cee
Original Author
last year
Thanks for the reply. Seems like there is nothing wrong with the furnace itself. The thermostat was acting a bit weird so the technician on the phone told me to reset the thermostat. It worked!

no more short cycling and the temperature reading is more accurate! the heat turns on itself every 15-20 minutes now!

thanks!
mike_home
last year
What is the brand and model number of your thermostat?
drewc cee thanked mike_home
drewc cee
Original Author
last year
hi mike

it is the

Honeywell TH2110DV1008 PRO 2000 Vertical Programmable Thermostat
mike_home
last year
The Honeywell TH2110DV1008 is a very basic thermostat. Was this installed as part of the new furnace installation? You said you reset the thermostat. I am curious how you did the reset. Also does it have a fresh set of batteries? I am wondering if there was a power glitch and the thermostat came up in an weird state requiring a reset.

Sign Up to Comment

Related Stories

ACCESSORIES Everyday Home Must-Haves Beg for a Makeover

By Vanessa Brunner

The Nest's much-improved take on the thermostat has us pondering reinventions of other necessities around the house

LIFE Modern Manners for Conflict-Free Family Visits

By Laura Gaskill

Avoid thermostat wars, pet peeves and the great shower squeeze with these tips for having family as houseguests

HOME TECH Switch On the Phone-Controlled Home

Lock your front door from afar, let your thermostat set itself and more when you use your phone as a control device

BATHROOM DESIGN Warm Up Your Bathroom With Heated Floors

By Tiffany Carboni

If your bathroom floor is leaving you cold, try warming up to an electric heating system

THE HARDWORKING HOME CES 2015: Inching Toward a Smarter Home

By Mitchell Parker

Companies are betting big on connected devices in 2015. Here’s a look at what’s to come

BATHROOM DESIGN 10 Amenities to Make Your Bathroom Extraordinary

By Ventana Construction LLC

Go beyond the basics for a luxury bathroom experience, with extra-special options starting at only $25

FLOORS What to Ask When Considering Heated Floors

By Toronto Interior Design Group

These questions can help you decide if radiant floor heating is right for you — and what your options are

REMODELING GUIDES Banish Gizmo Blemishes on Your Walls

By Bud Dietrich, AIA

Unsightly switches, vents and outlets can ruin your interior design's clear complexion. Keep the look pure with an architect's tips

REMODELING GUIDES How to Hide Your Home's Mechanics

By Affecting Spaces Design Studio

Get ideas for clever ways to disguise your ducts, air returns, drains and more

HOME TECH In Rarefied Air: Meet 3 Cutting-Edge Home Sensors

These new all-purpose sensors send alerts to your smart phone about temperature, air quality and a whole lot more. Why not?

Sponsored

Dream Baths by Kitchen Kraft

12 Reviews

Your Custom Bath Designers & Remodelers in Columbus I 10X Best Houzz

More Discussions

Installing a AC into a sleeve question

3

Bryant vs Goodman vs Ruud

10

Backsplash / microwave venting

4

Navien tankless heater stopped heating water after electrical outage

2

Installing a powder room on main floor with hydronic radiant heat theo

3