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The pressure switch is a round diaphram with a vacumn hose going to it any wire is good even a piece of tstat wire just strip both ends and after the furnace draft motor starts running, immediately...

Also remember if unit starts on reset put a small wire on pressure switc terminals after it starts and if it keeps running that's your problem I don't know if you did that let us know. Mikie D

Inside furnace cover tells u codes it will say what 3 short and 1 long means , as far as flame rod or sensor what ever u have ,one or two small scews holds assembly together look at it before u take...

Does the draft motor keep running if it doesn't check voltage to it if it still has voltage its probably the motor also check to see if flame sensor is clean and making a good connection if the...

Most high limit switches don't have resets look for another switch usually mounted behind the gas valve on the heat exchanger, look for a square metallic material with two prongs facing you and two...

Most of the time it's the high limit switch pull the wires of and ckeck with a volt meter to check continuity it should be made or just jump it out if it starts you know the limit switch is bad. Good...

The readings look good and that's 83.4% and that's good all the figures look good . Did any one put antifreeze in the system or any alkali based cleaners or did you have hot water off the boiler that...

If it doesent have pvc piping for fresh air and exhaust its not high efficiency but what you could try is look for a ductwork joint and pull out the slips and drive and disconnect supply ductwork and...

I highly Doubt it I can tell you how many time techs set up new and old furnaces and never put there manometers on them. Mikie D

First of all lets start with is this a damp and uninsulated cellar, and if you have a lot of cold water pipes condensating you can go to home depot and buy pipe insullation very inexspensive with...

20 ohm fine, test all limit switches firsy when you touch leads together meter should read 0 that's continuity take wires off limits and test all should read zero. Now the pressure switch should...

Whose idea was it to use a tankless hwh for heat there is not enough volumn of water to start circulating water they heat up so fast it hits the cold water in the pipes there is no time to mix you...

The flame sesor has a resistor wire did that melt to inducer and did you check pressure switch remember it is open when the system starts and then the inducer motor pulls in the pressure swith to...

I would check the pressure but you need a manometer propane feed should be 11-13 # feed and manifold pressure 10.5 depending on unit specs, but pilot lite can also be adjusted if its too small. Let...

You would have to flush system with R11 and the reversing valve has to be changed and the expansion valve has to be changed or orfice to be changed and yes it will work ,you will have to play with...

How you fried the board I can't even imagine but if you did you have to check all the limit switched are made, jump out each one at a time , if any of them have no continuity the furnace will not...

There is a way of resetting the tsat but its in the installation manuel you need the model ## of tstat. Mikie D.

Number one I would put a chimney cap on ,that's a ton of condensation comind down that flue and are you sure they used flue pipe not light gage duct pipe and the front of the boiler is all burn't...

What type of furnace does it have a board with the blower relay built in and does the blower turn on when the flame goes out if it does then jump out each limit switch one at a time but most likely...

I know you probably don't have a monometer so try this test, the pressure switch must be in a open position when the furnace starts 5 seconds after the inducer motor starts jump out the two terminals...

First take a volt meter and see if there 24 -27volts at the furnace between r and c if you do your OK if not you touched them and blew the 3 or 5 atc fuse in furnace if no fuse you blew the...

Make sure you didn't shut the emergecy switch off by accident, check circuit breakers and then go to furnace , see if the switch is on, if it is shut off for 10 seconds and turn back on. Give me more...

If radiant heat penetrates tile and stone its not even an issue. MikieD

Do you have a high efficiency furnace with pvc exhaust and fresh air make up , if you do the exaust is not pitched back enough to the furnace and then to the trap and drain, that will create water...

You would be surprised HaHa

There called dampers and are connected to a zone panel. What type of damper motors are they orange trola-temp ,blue trola-temp, motors or updated ewc or honeywell motors. Most times the mortors can...

Put the white wire on aux heat and see if reversing valve denergizes so it goes into heat pump mode or vise versa see if the electric heat back up pulls in it can only be one or the other especially...

Simply go to the furnace and see what wires are on the terminal strip but at the tsat ,jump Rc and Rh W to W G to G Y to one side of contactor at condenser .Mikie D.

No info on what your working on electric,heatpump are there fuses before electric sequencers or do you have a heat pump with a sequencer with electric back up, give us more info. Mikie D

Do you have separate systems if you do take the jumper out of tstat Rh and Rc That will separate two transformers. If you have one system you will need a all purpose relay to separate the two, let me...

What type of zone panel do you have? When the tsat satisfys does the zone shut down? What type of zone dampers to you have? Lotts of questions that need answers. Post the info system ,zone system...

If its filtered properly and serviced properly it could be better ,now with the latest humidification units and the new uv light , bacteria killing process it is better.Mikie D

There is no ignition you need to post more info:if its gnition off the control board you can put a universal ignition starter on and wire it one side on common and the other side on w terminal or tap...

Ps Remember put jumper on pressure switch after inducer motor runs for 5 sec. Mikie D

The glow is the ignition which seems to be working but your saying you should here a click from the gas valve and then it opens causing the fire. Try this make a jumper that you can put on the...

Is the a/h being used for heat and a/c ? Do you have a boiler feeding hwh coil in the a/h ?need more information. But the most common wiring is tstat red -R white - W green -G yellow -Y C-common...

The loud banging is hot steam coming in contact with cold water sitting in the pipes you must get more pitch back to the boiler there is no other way around it . Mikie D

If there is only two wires on your tsat put the wires on rh(should be a jumper on Rh&Rc( and the other on w and if you have a/c if you have a main control switch on the furnace or a/h that switch...

1st you need much more information this is obviously a heat pump with emergency heat backup and I'm not sure if the 3100 is compatible I always use the honeywell pro 4000 with heat pump and its...

1st is this a furnace if it is open the wiring panel and read the terminal strip; red is r ( one side of 24v) white is w(heat) c is common other side of 24v(not needed on tstat if batteries are used)...

Im sure your talking about the condencing coil mounted on your furnace and all u need is 3/4 pvc piping and a trap to the drain or a cond. Pump . The pan under the coil should be flushed out with...

If the lines froze up outside it sure seems like its low on ref. but its also possible if there is a kinked line , check visually that nothing is crushed or restricted

One possibility if you have a line set that travels vertically to an attic liquid ref. can migrat back to the comp and cause a hard labor upon initial start and the lack of oil flow because of season...