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My furnace looks running, but no hot air, no hot water.

It sometimes happened when some lights lit on the temperature control panel attached on the body of the furnace, not on the wall, but I didn't pay much attention because it didn't last for long. But this time, it has been like this for over 12 hours. There are six lights. Far left is Warm and far right is very hot. The leftmost "vacation" light lit in green. The third and sixth lights lit in yellow. I tried to unplug and re-plug the electricity in about 10 minutes in vain. How can I turn off the vacation light, if it's the problem?

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  • Harry Goh Jan 12, 2013

    I don't know why my question is posted in car and truck section. It is about household furnace.

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Have you figured it out yet? If not what type of heating unit is it?

Posted on Jan 15, 2013

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Heater not warming or taking too long

First off need to know if it is a 2.0 or 1.8T engine. Most likely you have a 2.0L engine. The coolant light on the dash will stay blue untill the temp reaches a set temp by ECM, then goes out. Since the Beetles do not have a temp gauge you dont know what the actual temperature is. I replace thermostats on these all the time for this problem on these cars. To test this, start car and let run at idle and set heater fan on low. Let run untill you feel warm to hot air coming out the vents. Once its as warm as it is going to get, go drive the car at a steady cruise and see if the temp drops. If so then you need a thermostat replacement. I only use OE VW thermostats 050121113C. Hope that helps you out. Kevin

Posted on Jan 22, 2009

  • 1 Answer

SOURCE: Heating/Air conditioning Control

hi to get the lights to stop flashing this is with you have to do he reason they are on is beacuse the battery has been removed at one time ok this is the was to get them to stop flashing. first start the vanthen slide the temputer lever all the way to the right then set the mode control to panel (this is the mode that send air to your face)then put the fan speed to full power now go to the leftmost three buttons press the top one(rear wiper on constant) and the bottom one(rear wiper hold thest for a few seconds once the lights come on solid then begin to flash you can let go. the ac will now calibrate you will feel air blow out of all the vents at different intervals and see lights come on and off then after a minute or two the top button you pressed will be slowly flashing this means it has been completed but let it run for a few minutes more to make sure nothing els flashes then press the last flashing button then your done if you need more help email me rockystevenson@hotmail.com

Posted on Feb 01, 2009

roy7777
  • 109 Answers

SOURCE: 2001 v70 erratic air conditioning

ALL 850 and S-70 models with climate control have these issues and i am an ASE VOLVO MASTER TECH and you must have a lot of experiance to troubleshoot and fix these systems and 20 pages of tests it sounds like one of the damper motors is not working these motors direct air flow to different duct outlets

Posted on Jun 08, 2009

  • 318 Answers

SOURCE: 2003 Chrysler Town & Country Headlight & signal light problem.

Right headlight sounds blown to me. Other problem needs to be looked at.

Posted on Sep 26, 2009

  • 373 Answers

SOURCE: check engine light blinking 10 times

The pcm (powertrain control module ) is telling you it has a set code in the memory. Take the car to a parts place like (auto zone ) and have them to run a scam on the pcm for a trouble code. Once you have done that then you will be able to correct the problem. Hope this will help you.

Posted on May 27, 2010

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Heat won't shut off,exceeds preset temp


Hi Jim.

There are a couple of possible root causes here:
  1. The temperature at the thermostat isn't as high as in the rest of the house. Drafty window or door near the thermostat, no heat vents near by. Any of these, or other things leading to cool air by the actual thermostat, can lead to heat staying on. The thermostat controls temperature by sensing temperature whereever it's mounted - you don't for instance, want it mounted directly above a floor vent. If the thermostat itself is cool, then it thinks the whole house is cool and keeps the furnace running.
  2. The temperature sensor in the thermostat is isolated from the surrounding air. The temperature sensor for the thermostat is usually inside the unit. Of airflow into the unit is blocked by nearby stuff, a cluster of dust bunnies, or a large piece of tape or ribbon holding the just-hung holiday decoration, then that outside air might take a while to get to the sensor. Make sure that there are no overt blocks to any vent holes in the unit. If you have a fine-cleaning/crevice tool attachment for a vacuum, you can use it to pro-actively suck dust off of/out of the thermostat.
  3. The sensor is broken/disconnected. Electronic parts do fail sometimes. If the sensor just keeps reading 55 degrees, or some other low temp, it may be that the thermostat itself is kaput. Fortunately, they're not very complicated to replace.
  4. To test / troubleshoot, start by clearing / vacuuming the thermostat. Then, if possible, get a hair dryer and after the furnace has run to 'too hot in the house', blow warm/hot air on the thermostat for a few minutes. If the furnace shuts off, then the thermostat is picking up the temperature change, it just is not reading it very well. Sometimes there are calibrations/re-calibrations that can be done. You'd have to get / look at the documentation for your particular unit on that. If there is no change when you use the hair dryer for a couple of minutes, I'd lean then to the sensor being bad, or something else in the controls being post-warranty.

    Good Luck!
    D

Nov 30, 2015 | Heating & Cooling

1 Answer

Pilot light lit but not igniting to heat water


pilot lit on gas furnace, but the burners won't light (Home ...

answers.angieslist.com > Home > HVAC
Oct 26, 2013 - i have a gas furnace with a lit pilot, but the burners won't light. ... if the thermocouple does not sense the heat of the pilot it prevents the gas controller fromturning on the burners. ... clamped onto the outgoing hot water pipe, if huydronic system) that is telling the furnace it is too hot, whether or not that is true.

Nov 18, 2015 | Water Water Heaters

1 Answer

About once a week, I have to unplug the bottom end of the condensate tube on my high efficiency furnace and let the water out, then do a reset so the furnace will run. Why is this happening and how do I...


Condensate drain plug? New to me. Remove the plug and put a 5 gal. bucket to catch the water and remember to drain the bucket, so the furnace won't trip.
When hot plenum is not set hot enough, moisture will condensate on the heat exchanger. This moisture is acidic. It could be your hot plenum temperature needs to be raised to avoide frequent moisture problem.
By the same token, heating and air cooling removes moisture from the air and air needs moisture to feel warm or cool. Dry air is not desired.

Jan 05, 2015 | Heating & Cooling

1 Answer

Oil furnace only produces cool water intermittedly and only when heat is actively on


For clarity, a Furnace produces HOT AIR for heat while a boiler produces HOT WATER for heat. Just remember...boil = water. You said your "furnace" does not produce hot water for a shower and because furnaces do not product hot water unless they have some model that do???? Usually people with a furnace have a seperate hot water heater. People with boilers though can produce hot water for use as both their sinks/showers hot water and their heat (by heating water that goes through baseboards) in their house. I don't believe any furnaces produce hot water most of the time a furnace just produces hot air for heating. So figure out what you first have.
Having said that, I'll assume you have a boiler like I do and my Weil McClean(sp?) stopped working a while back and wasn't turning on to "boil" any water. I took apart the burner and there is a light sensing photo resistor as part of the controls. If this phto resistor goes bad, the boiler will not start. The resister is cheap, I think it was $8 but you have to know what you're doing to change it. So you may be better to call someone who can work on such equipment.
Boiler's themselves are not overly complex. Home heating oil is the same diesel fuel that you can buy in a gas station only the government has "oil" companies put a RED die in home heating fuel which is usually cheaper then Diesel fuel because diesel fuel is taxed to death. The reason they do that is so that if you try putting RED tinted home heating fuel in your truck and you get pulled over (because you're a trucker with and 18 wheeler and they typically do inspections of these trucks) you will be a huge fine if they see you're running home heating fuel and NOT paying your taxed by purchasing Diesel fuel. A little bit of background so you know the fuel you are dealing with here. So it's dieslel fuel without the tax you run in your boiler. Gasoline on the other hand is VERY explosive as you know, but diesel fuel (if you're ever tried to light it) takes some coaxing to get lit. When it's cold out, diesel fuel is very hard to light and that's why trucks use glow plugs. You don't need those in your home though.
But because diesel fuel/home heating oil is hard to light, it's sprayed as a msit into your boiler, so that it can light more easily.
But because it is a fuel, you should know what you're doing when messing with it. FInd out what you have, and then have someone work on the issue if you haven't already. I'm guessing you have had it fixed by now?

Mar 21, 2014 | Water Heaters

1 Answer

Why does the humidity in my house go up when the furnace is on?


Humidifiers are usually controlled by a humidistat that reads the humidity in your house and turns the water on and off to humidifier that is attached to your furnace. When your furnace is running it sends the voltage through your humidistat that then runs water through a filter screen inside humidifier and the furnace forces air through this screen which places humidity into your home. If humidity too high look at dropping level on humidistat control. (Usually attached to ductwork bye furnace)

Nov 03, 2013 | Heating & Cooling

1 Answer

I have a Reliance 606 natural gas water heater. It is 8 years old. The pilot light went out on it and I replaced it. I lit the heater and waited 30 minutes to check the water temperature. The bottom of the...


1) Bad gas control thermostat, or thermostat has come out of calibration, or water leak running hot water out of tank.
Turn up temperature.
Replace gas control valve.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

2) Clean air intake, put ear against pipes and listen for water leak, check that flame is clear blue and that combustion gasses are flowing up the vent pipe and not blocked.

3) Call service technician.

Dec 31, 2012 | Reliance Natural Gas Water Heater Control

1 Answer

The blower is running and the T-stat is turn down to 50. Its a hot air furnace only no a/c. The red light is flashing on the white rodgers control bord. The code for it is flame no call for heat.


The circuit board thinks the furnace is running when it isnt supposed to. Check your flame sensor its a rod that senses the flames when they are lit clean it and also make sure it didnt get wet or is touching anything metal except for the porcelin. If that dont work you need a new circuit board. Let me know what happens

Sep 15, 2011 | Heating & Cooling

1 Answer

Reliance 606 natural gas water heater - model #640YORT - water does not stay hot. pilot has to be clicked to heat and then u can use hot water til tank empty and it will not continue to heat water.


If I understand correctly, the pilot light is not staying lit.
You light the pilot and water in the tank reaches temperature.
Once hot water is gone, then pilot light has to be lit again.

Gas pressure is good, and gas is flowing.
Thermostat is working at high end because it cuts off heating.
Vent is working because tank heats up.
Air intake is working.

Gas control thermostat might not be reading low temperature. Replace gas control valve.
Pilot tube might be dirty. Clean burner parts and combustion chamber, and air intake, and vent.
Backdraft might be blowing out pilot. Check for constant updraft by running water heater 5 minutes, and then light match under vent hood and see if smoke goes up.
Very hot air can put out pilot, especially when water heater located in attic. Add ventilation.
Improper vent might have water dripping back down into combustion chamber and putting out pilot light and rusting out the parts. Inspect for rusted parts and water.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf

Aug 09, 2011 | Reliance Natural Gas Water Heater Control

1 Answer

We have a Janitrol PGB 048125-1 unit and it is not blowing heat. the fan comes on when in fan only mode on thermostat but once we turn it to auto it goes off. we cannot get the unit to blow hot air. does...


If the unit is newer than 10 years I guess there will be no pilot light per sey. You will have to look at it to tell for sure. Here it is supposed to work. When there is a call for heat the thermostat will close and send a signal to the furnace to start the exhaust blower. When the blower gets up to speed, it closes a pressure switch that will send voltage to the gas valve and to the igniter. The igniter glows or sparks lighting the pilot. Once the pilot lights it sends a signal that all is well, then the gas valve opens up more and the burner(s) light. There is a sensor that tells the control board when the flame has stayed lit. Once that is done, after a period of time or as the heat exchanger gets to a specific temperature, it will turn on the room air blower and blow hot air. Once the thermostat has been satisfied, the furnace turns off. Now, get in front of the furnace and with the door panels off (you may need to tape down the door safety switch to make this work) watch the furnace go thru each step I described. Once you see where the problem is, you can start the proceed of repair. There may even be a flashing light indicating a problem. Find the wiring diagram on the furnace and look for a diagnostic chart and compare the number of blinks to this chart.

Oct 17, 2009 | Goodman Heating & Cooling

1 Answer

I have a gmpn-80 janitrol 90% eff gas furnace,it is only 15 months old,my condisation tray is melting and cracked do to heat in which case leaks water all over....why would this be happening?


Most likely the cause is that the furnace is firing too hot. When a furnace is installed and set up, the manifold gas pressure and fan speed has to be set by the technician so that the temperature rise through the furnace is a maximum of 50 deg F (i.e. if air enters the furnace at 68 deg F it come out no hotter than 118). The target temperature rise on any gas furnace is anywhere between 30 and 50 deg F. If the furnace runs too hot, either the manifold gas pressure must be turned down or the fan speed must be turned up to keep in this range.

Jun 28, 2008 | Heating & Cooling

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