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Lineset from condenser too close to a-coil connection for flue pipe on furnace

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The line sets are made of copper and should bend in long sweep!

Posted on Sep 13, 2008

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Have a older achiever 90 plus and the furnace won't ignite whats the solution thank you


Check make sure gas is going to unit if yes check to see if smaller motor comes on this is for flue pipe check if egnighhter is sparking .if you have gas and fan runs must likely is egnighter.also make sure flue pipe isnot clogged this will also shut you down

Feb 17, 2015 | Air Conditioners

1 Answer

Just replaced pressure switch on intertherm m1mb gas furnace but still codes "pressure switch open"


CHECK FLUE FOR OBSTUCTIONS AS WELL AS COMBUSTION AIR INTAKE FIRST. THEN CHECK TO SEE IF THE FURNACE DRAIN IS OPEN AND NOT CLOGGED [ONLY IF YOUR FURNACE IS A CONDENSATING HIGH EFFICIENCY MODEL, typically the flue pipe will be 2 or 3 inch pvc pipe] over the years more often than not, it is an obstruction or poor drainage which will not prove the pressure switch to allow the burner to ignite. in rare cases the furnace control board could be bad as well.TRY DISCONNECTING FLUE AND COMB. AIR AT FURNACE JUST TO SEE IF FURNACE WILL IGNITE. HOPE THIS HELPS!!!!!!

Oct 20, 2011 | Intertherm P3RA-048K Air Conditioner

1 Answer

I had an 80% goodman put in and the installer piped in the venting to the exsisting flu which has a tie in from my Hot Water natural draft Tank. Now there looks to be problems with condensing flu gasses...


They need to be seperate to function properly. They just to the shortest route they could get away with saving some time. B vent has to be double wall furnace pipe all the way through seperate from any other pipe. Call them back out, or call you local gas company at know charge, and tell them you believe tou are having problems with flue gasses escaping. They will come right out to check it for you.
Shastalaker7
A/C, & Heating Contractor

Apr 17, 2011 | Air Conditioners

1 Answer

I am getting a code for flue blockage and flame out abot one every three days. There is an unusual amount of ice building up on the exhaust that I have never witnessed before. Not enough to seriously block...


This is from condensation formed by the combustion. Typically the manufacturer call for the pipe to be pitched UP to the wall outlet. This is to allow the condensation to run back to the furnace/boiler and be drained out instead of running outsidde and freezing. Check it with a level or for imprpoer hanging of pipe that may form a BELLY.

Dec 21, 2010 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

Wiring diagram for Thermoking V700MAX


Red or R is the "Hot leg" of the Transformers 24volt supply,
Common or C is the "Neutral leg" of the Transformers 24 volt supply;
and the side of power to which ALL the 24 volt control circuits
terminate to complete the circuit, example; Heat=W, Cool=Y, Fan=G.
Upon a call for heat a switch closes betwen the Red and White Thermostat terminals.
The stat sends the 24 volts to White or W for the heat circuit on W on the
furnaces LVTB low voltage terminal board.
Yellow or Y goes from Thermostat to furnace Y on LVTB, which is simply
a connecting point on its way to the AC units 24v contactor coil located outdoors.
It actually isnt even attached to the furnace many times as it serves no purpose there and simply
continues to the AC unit with the copper lineset that the AC unit feeds.
The remaing 24 volt Thermostat wire goes back to common on transformer to complete the Yellow
24 volt control circuit.
Green or G exits the Thermostat and connects to G on LVTB for the fan relays 24volt coil
and returns to Common to complete the Green 24 volt control circuit.
O is for a Heat pump reversing valves 24 volt solenoid, and return to Common as all 24v circuits must to terminate or complete the circuit.
Some parasitic type Termostats need the 24v power to run, some are battery, some are both.

Nov 01, 2010 | Air Conditioners

1 Answer

2003 Ruud A/C upflow model UAMB024JAZ/ coil installed above furnace. Water is leaking from the back of the coil unit and down into the return air register. What could be causing the leak? Is there a...


There are only a few ways that water can be leaking out of the back of the unit and neither are very easy. Since you have said the unit was taken out and cleaned, it's hard to imagine that the coil drain pan has clogged up already, but it is possible. And since it's a newer model, I would think that it would have a plastic drain pan inside which would have to be cracked in order to leak. Either of these have to be checked by removing the flue pipe in front, which shouldn't have more than 3 screws holding it to the furnace if any, then gently trying to twist or move it until it either comes loose from the joint or able to move out of the way. Then you have to take the front cover of the coil box which is usually held on with 1/4in or 5/16in screws. Sometimes this can be really fun, just have some patients, and remove the cover. If the copper lines are in the way, you might have to cut the metal with some tin snips and tape it back up good after reinstalling it. Some installers don't think about servicing the unit when the put it all together. After removing the cover, you will be able to see the drain pan and what exactly it is doing. If the pan is full of water with the unit on, then your pan or your drain line is clogged. If your drain line is clogged, you will either need a high pressure hose to blow it out like a co2 drain tool or you will need the lines replaced. If you have no water build up inside the pan, then the pan is busted and will have to be replaced. Condensate pumps are usually only used when there is no place to place a drain line inside your utility closet and it would sit on the outside of the furnace. It's a lot, but I hope it helps!

Aug 15, 2010 | Air Conditioners

1 Answer

Condensation in the furnace, as a result of which air is not being circulated. Air conditioner is Carrier Model#38CKC036340. Is there any place where I should be removing the condensed water??


The coil for the AC sits above the furnace. Two refrigerant lines enter the
plenum, usually the condensate line is on the same side and at the bottom of the plenum. Sometimes they use pvc pipe or a garden hose to drain the condensate.

Your problem is worse than that, it sounds like your indoor coil is froze up, that is why you dont have airflow, either you have a dirty filter or your fan does not work

Jul 08, 2010 | Air Conditioners

1 Answer

Amana 90% model #GUCAO45AX30 SER# 0109143635 UNIT MAIN BURNERS LIGHT UP THEN SHUT DOWN IN A FEW SECONDS. DRAIN LINES ARE CLEAR, VENT PIPE CLEAR OF CONDENSATION. I BYPASSED T-STAT JUMPERED R-W NO HELP,...


check to see if the flame rod tip is in the flame(like the hot junction on a thermocouple). the pressure switches are a normally closed switch and a blocked flue could cause them to open. the circuit board should run through the safety switches and check them before the gas is opened at the valve. also the drain lines that you see at the inducer fan should be free of condensation but if the inducer fan has condensation in it, it will open the airflow safety switch. you will hear the crackling noise from the fan. also there should be a trap below the fan that should be full of water to keep the fan from pulling air from the wrong place. I would not suspect the board at this point

Dec 13, 2009 | Amana PTC074B25AE Electric Heat Air...

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