I have a honeywell vision Pro TH8000 thermosat. The system is set through the stat to 62 at nite, to go to 67 at 6 AM, back to 62 at 6:45, to 73 at 4:30PM, then to 62 at 1000PM. However it comes on sometimes at 2AM to 73, or the other day it came on at 11AM to 73. Any ideas how this can be fixed?
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The system type has been incorrectly set during the installer setup. The t/stat thinks there is auxiliary heat equipment that is controlled by a signal on the Aux-E terminal which you obviously don't have. My recommendation would be to go to the Honeywell website and download a copy of the installation guide for the FocusPro 8000 and go through the installer setup again but select the appropriate system type under setup function 1.
Your t-stat should be set up so that the furnace is the second stage heat and also emergency heat. First stage (heat Pump comes on) sometimes they use Time to start 2nd stage, sometimes they use outdoor temp and this all bepends how bryant has set it up, without a model # I cannot tell you but send it and i will look in somebooks i have to tell you.
Is this a pro 8000 I don't have the phone # right now but it should be on the installation manuel for a hot line to tech support. Did they hook up a common wire to the thermostat? Did they go through the setup and tell the stat what kind of equipment it is controlling. That stat has a 5 year warranty on it if it is acting up you will have to call Honeywell tech support and they will get your information and authorization to get it replaced. I have call them several times and they were very helpful.
You didn't include a model number, so it's hard to know for sure - but I'll take a stab at this one. Many of these t-stats have a programmable offset to reduce "hunting". This can be as little as 1 degree or more than 2 degrees.
This means if you set the offset to 1 degree and the room temperature to about 65 degrees, the furnace will heat the room until the t-stat registers a rising temperature of 66 degrees. The furnace shuts off and will not turn on again until the t-stat registers a falling temperature of 64 degrees. The average is 65 degrees, and prevents the furnace from starting and stopping numerous times instead of just once with the 1 degree offset.
You can further reduce the number of furnace start and stops by increasing the offset to 2 degrees. This would work like this when the t-stat is set to 65 degrees and the room is cool:
Room Temp Furnace 63 On 64 On 65On 66 On 67 On 68 Off
The room is now warm and heat or furnace is off. The room begins to cool like below:
67 Off 66 Off 65 Off 64 Off 63 Off 62 On
With a 1 degree offset, the room temperature varies +/-1 degree (about 2 degrees total). With a 2 degree offset, the temperature about varies +/ -2 degrees (about 4 degrees total).
Also, when the thermostat shut the heat off, the heat that was made is delivered to the space instead of wasted by sending outdoors - so the room will get a little warmer even though no fuel is being burned. The same holds true at the other end. When the t-stat turn heat on, fuel is burned, but there's little heat until the source has reached the optimum temperature and then the heat is delivered to the space.
I hope this helps & good luck! Pleas rate my reply - thanks!
RC & RH JUMP WITH R FROM AH & CU C/U - A/H - T R - R - R = 24V C - C - C = COMMON Y - - - Y = COOLING G - G = FAN B O\B = REVERSING VALVE - HEAT make sure the stat is set up for heat pump Not sure what b or d are. i would double check the schematic on the condenser for the reversing valve wire.
Whats' so hard is the Honeywell thermostat has a built in 1@ differential. It is not adjustable. You might ask your installer about a time delay relay installed in the furnace to break the thermostat heat wire (usually white wire). Most time delay relays are 90 seconds. But that might be enough to reduce the furnace cycling.
The Vision Pro is a great t-stat and I have installed many of them with great results. I am wondering though if it is set up correctly. Did you go in and make sure that it is set for heat pump and for 2 stage heating? Look on the instructions how to get into the advance installer options. Go through that meanu and make sure that everything ig set correctly for your type of heating system and that it is set for 2 stage heating. From what you have here and I can tell the wiring should be okay that is why I think that it is in the t-stat programming.
You have two systems.
These two systems should be wired totally independent of one another. I have the Pro series t/stat in my house. I love it.... I am a retired contractor I get stuff at cost. I paid about $130 for that t/stat. I understand he is in business to make money. But he should be fair enough that in the future you would want to call him back, Or even give him a nice referral. Alol this guy wants is your money. If the first guy admitted thatbhe did not have the expertice. He shouldn't be paid the experts price.
Call your city or county building inspectors office. Tell them that you would like a list of 4 or 5 reputable heating contractors in your area.
$275 should be fair for the nice t/stat and a fused transformer. Although a cheap t/stat would be fine.
Plus 75 bucks to pull upthe driveway. 60 -90 bucks labor to staighten things out. You should not have to pay for the romantic weekend away for the contractor and his wife.