Having problems with your Superior Lennox Blower Thermal Sensor - BTS ?

Lennox Fan will not come on when set to ''auto'' position.

\015 I have a Lennox gas furnace. For some reason, the fan is not coming on so when the fan is set in the ''auto'' position, if the furnace lights it will go off in a few seconds. It's like it recognizes there is no fan to blow the heat. However, when the fan is set to the ''on'' position on the thermostat, the heat warms as usual and works fine. The problem with this is the fan has to stay in the ''on'' so that the heat will come on when necessary in order for the house temperature to remain at a comfortable 72 degree which is where I usally set my thermostat. Does this sound like an expensive problem to fix? Can someone help?\015

Answers :

Expensive is relative, service calls are never free. But if you have an idea what the problem is, you are armed against an unethical service company. Now to what you describe, could be a couple things, first let me explain the difference in fan speeds. Furnaces that both heat and cool have multi-speed blower motors. High speed is for cooling and lower speeds are for heating. The fan switch at the T-Stat turns on the high speed fan relay. The lower speed fan is turned on by either a temperature activated switch (silver box mounted on front on furnace above burners) or a time delay relay which is solid state. That being said, your problem could be a defective fan switch or one of your blower motor windings has gone bad. Most motors have 3 or 4 speeds and a technician could just change speeds and all would be good. A fan/limit switch is not so expensive that you would replace the unit. Bottom line, unless your really handy, a heating company is in your future. Good luck and please rate my answer if it was helpful to you.\012\012 
My heat is now not blowing out my vents , I hear it is on but no heat coming out the vents
lennox ch23-51-1

Repair Help & Product Troubleshooting for Superior Lennox Blower Thermal Sensor - BTS

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Lennox Fan will not come on when set to ''auto'' position.


Expensive is relative, service calls are never free. But if you have an idea what the problem is, you are armed against an unethical service company. Now to what you describe, could be a couple things, first let me explain the difference in fan speed ... Superior Lennox Blower Thermal Sensor - BTS

Computer ranbdomly shuts down


Your last question was very observant. NO, without an O/S, there is nothing to make a anti-virus program run.I suggest the problem in the beginning, was that the laptop was overheating. Once the processor becomes too hot, (Processors have ... HP Pavilion dv4015CL PC Notebook

It turns off for no reason unexpectedly - Toshiba Satellite A105 Notebook


Is the Air Intake Duct dirty? (Bottom of laptop where air is drawn in)If so, this is an indication that the entire cooling system is dirty, as well as the other components inside the laptop.[Laptop off view the bottom. Laptop ... Toshiba Satellite A105 Notebook

Front panel Ac Switch failing to start computer.


Try these steps.\015\012If Power supply light does not turn on (or no power supply LED)\015\012Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:\015\012NOT ... Compaq Presario SR1000T (568657) PC Desktop

After pluging in no power or power light


All of you have the same problem I have--the crazy thing won't boot up--blue lights but a dead, black screen. I've also had problems with the laptop becoming really hot. I've "resolved" these two issues by 1) setting the computer to never turn off. ... HP Pavilion DV5-1000US Laptop

Hp pavilion dv5-1002nr will not power up - HP Pavilion dv1000 Notebook


Let's run through a basic flow chart.1.Plug the AC adapter, (Charger), into the laptop.Is the Power LED light on, and the Battery charging light?[The Power LED light is on the front edge of your laptop, all the way ... HP Pavilion dv1000 Notebook

My computer comes on but my screen is blank - Gateway PC Desktops


Hi tytiyana..i am giving my sugggestions.Remedies. The remedies below should be performed \015\012\015\012 in order. NOTE:Turn off the computer after each step. Never work inside the \015\012\015\012 compute ... Gateway PC Desktops

Chang mainboard - HP Compaq dx2300 Microtower - RT950UTABA PC Desktop


Normal 0 MicrosoftInternetExplorer4 \015\012 /* Style Definitions */ table.MsoNormalTable\011{mso-style-name:"Table Normal";\011mso-tstyle-rowband-size:0;\011mso-tstyle-colband-size:0;\011mso-style-noshow:yes;\011mso-style-parent:"" ... HP Compaq dx2300 Microtower - RT950UTABA PC Desktop

Computer is on (altho the wireless light is orange) but the monitor will not come on


HOW TO FIX YOUR DV6000/DV9000/DV2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms of the Laptop ... HP Pavilion dv9000z Notebook

I power on my hp pavilion dv 2000 it turns on just fine but nothi


HOW TO FIX YOUR DV6000/DV9000/DV2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms of the Laptop ... HP Pavilion dv6000z Notebook

Upon boot up, screen remains black,disk power up briefly


HOW TO FIX YOUR DV6000/DV9000/DV2000/tx1000/tx2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms ... HP Pavilion tx1000z Notebook

The HP Pavillio 9700 Laptop computer will not turn on


HOW TO FIX YOUR DV6000/DV9000/DV2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms of the Laptop ... HP Pavilion dv9000z Notebook

My emachines EL 1200 desktop stopped working during bad storm


You can try to reset the computer by removing all power sources and letting it sit for a time. Then powering it back up and see what happens. That's called a hard reset. \015\012I am guessing that the storm surge damaged your motherbo ... PC Desktops

My HP Pavilion dv9700 was over heating and would shut off. Then it wasn't over heating and would shut off. Now it won't turn on at all. The power cord is working and the lights go on for a second while I am pushing the button to turn it on, but the computer won't turn on. HP told me the problem was the motherboard. Do you think that's really the problem or could it be something else?


HOW TO FIX YOUR DV6000/DV9000/DV2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms of the Laptop ... HP Pavilion dv5215us Notebook

HP dv6000 Laptop LCD has no graphics (Always white)


HOW TO FIX YOUR DV6000/DV9000/DV2000\015\012All the Problems described are Graphics Related..\015\012Faulty Nvidia Chip..Both Intel And AMD Based Motherboards..Though More Common on the AMD..\015\012The symptoms of the Laptop ... HP Pavilion dv6000t Notebook

Power up replaced power supply, still won't power up. possible motherboard?


Does this mean no power at all, or just that the computer won'tpost.Do any of the fans spin ?Do the hard drives spin up and make noises?Do any lights come on?Is the cord OK?Is the rear power switch in the ON ... E-Machines eMachines Desktop PC

Screen problems/overheating problems


Hi,Auto settings in NVIDIA control panel are those which control the temperature of the system.It will check the fans revolution per minute and temperature. Actually it is always better to keep your system in an air-conditione ... Acer Aspire 5100 Notebook

Toshiba Satellite M65-S821 WONT BOOT UP


You didn't list what you did do, so you might have already tried this, but I think it's always a good idea to try re-seating the RAM and then try different RAM in the computer if you can. The symptoms seem to be identical to those caused by bad RAM ... Toshiba Satellite M65-S821 Notebook

Installed new motherboard, computer automaticly turns on, with out pressing power button and nothing comes on the screen


1. Check all connections again, especially the lead from the power button to the mobo. It seems a silly question, but is the four-pin ATX 12V connector firmly seated (it's gotta "click"). Yes, I know you've probably checked, but I had to ask. :-) ... PC Desktops

CPU Fan Speed Too Low or Fails***


There are three things you need to have a good gaming computer, fast graphics card, fast CPU, and lots of RAM. You didn't list your RAM so I can't help you, but 4GB is the most you can put in a computer. If you want to know everything about your comp ... ViewSonic VX910 19" LCD Monitor

Installation of a 2nd hard drive steps & tips


Step 1: Back up and scout around\015\012 First,\015\012back up your critical files (don't forget your Outlook .PST archive) to\015\012optical discs, an external drive, or online storage. Then check whether\015\012a CD comes with t ... HP Pavilion a1410n (ER890AA) PC Desktop

Errors My notebook keeps booting but I never get to the main screen because it's always saying errors. Then it gives a list of errors like 161,190, and 163. Then it just stops, not allowing me to doing anything except turn the power off.


Hi there.161 and 163 mean time and date not setany error like this is a dead giveaway you're cmos is dead.Its a really common problem.192 seemed to be incorrect voltage or fan the fan blows out the side to the l ... IBM ThinkPad T20 2647 Notebook

My dell optiplex gx270 froze now will not come back on


Here try my trouble shooting steps. Some I usually follow this when I can't get a power up. My no-boot flow chart has always worked for me (many years work for Gateway tech support has paid off).\015\012\015\012So basically you canno ... Dell OptiPlex GX270 PC Desktop

Monitor will not power up. was working fine last night, and now is not working at all. Just black screen.


Very incomplete thread..i gotta know 1st what is ur system\015\012configuration..is all ur system is getting power on..is there any light\015\012on cabinet glowing (the power n hdd)..is there is power light coming on\015\012ur monitor..is there any s ... LG Flatron 775FT 17" CRT Monitor

My monitor has no display at all - Dell Dimension 4600 PC Desktop


Very incomplete thread..i gotta know 1st what is ur system configuration..is all ur system is getting power on..is there any light on cabinet glowing (the power n hdd)..is there is power light coming on ur monitor..is there any sound coming out of th ... Dell Dimension 4600 PC Desktop
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || www.electronic-servicing.com || Terms of Use || Contact || Privacy Policy
Load time: 0.7361 seconds