Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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Unit kicks on as described and the main gas valve kicks-on and ignites and stays on for about 30 to 445 seconds and then goes out. Honeywell trouble-shooting chart says it may be a grounding problem of the igniter or excessive heat at Q 34 which causes short to ground. I can make it work by reducing Temp below room Temp for 60 + sec and leave fan in ON position then increase Thermostat above room temp. However, once it goes off it will return to lockout condition. Sounds like bad S86A Intermittent Pilot Gas Burner ignition System. Anyone agree? If so, where are parts available?

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I hate to admit it but this is a common problem with the Honeywell S86A control. If you can find a heating slpy house neat you that sells to the public your lucky, more than likely you will have to get it from a heating company. a carrier/bryant/payne/day&night (all made by carrier) should have one on hand.

Posted on Jan 02, 2009

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1F ERROR CODE appears on Hayward model # h250PED2


Code Fault Diagnosis Step Remedy
None
Open FC3 and/or
F1 Fuses
1. Check for faulty Gas
Valve wiring.
Inspect Gas Valve wiring. Ensure insulation on wiring is not worn. If
OK, proceed to step 2.
2. Verify that Gas Valve is
not defective.
Mesure for resistance across Gas Valve terminals and between each
terminal and ground. If short exists, replace Gas Valve. If OK, proceed
to step 3.
3. Check for faulty Control
Module wiring.
Inspect Control Module wiring. Ensure insulation on wiring is not worn.
If OK proceed to step 4.
4. Control Module is
defective.
Replace Control Module.

Ignition Failure 1. Ensure gas supply shutoff
valves are open.
Ensure that main gas shutoff installed adjacent to heater is open. Ensure
that knob on gas valve inside unit is in ''on'' position. If OK, proceed to
step 2.
2. Check for low gas supply
pressure
Ensure inlet gas supply pressure is between the minimum and maximum
values indicated on rating plate. If OK, proceed to step 3.
3. Check for faulty flame
sense wiring or connection.
Inspect flame sense wiring. Ensure wire harness terminals are securely
fastened to flame sense and to control module. If OK, proceed to step 4.
4. Check for faulty gas valve
wiring or connection
Inspect gas valve wiring. Ensure wire harness terminals are securely
fastened to spade terminals on gas valve. If OK, proceed to step 5.
5. Check for gas valve
failure or gas valve relay
failure.
1. Measure voltage across gas valve during trial for igintion. If 24VAC
is present and gas valve does not open, gas valve is defective. Replace
gas valve.
2. If 24VAC is not present, gas valve relay on control module is
defective. Replace control module.
6. Check for blockages in
gas orifices and burners
Inspect gas orifices for blockages which could prevent gas flow. Remove
and inspect burners for blockage

Jan 02, 2015 | Hayward H Series Electronic Ignition...

1 Answer

Amana dryer not drying


Step 1:

check the coil to see if they are energizing the gas valve as follows, open the small peep hole on the bottom left of the unit, turn machine on and wait ten seconds for the igmitor to turn on, when it glows wait for gas valve to open if gas vavel doesn't open you coils are bad .

Step 2:

If igniter doesn't come on its a bad fuse open the back panel and test all 3 fuses for continuity .

Step 3:

If igniter and gas valve are working properly it may be a restricted vent or torn belt .good luck APPLIANCES R EN

Feb 28, 2013 | Amana Dryers

1 Answer

Have a dayton 3F405D propane greenhouse heater don't know where to light the pilot light.


Find where the gas line connects to the gas valve on the back of the heater, from the gas valve, follow a small aluminum tube going into the back of the heater. There may be a removable door to access the pilot assembly. If there is no aluminum tube, the unit has electronic ignition and no pilot lite. Turn the gas knob to off, then to pilot. Hold the gas valve in and with a long match or gas grill lighter, light the pilot. Continue to hold the knob in for about 30 seconds. After that, release the knob and check to make sure the pilot stays lit. If so, rotate the knob to ON. The thermostat will kick the burners on.

Mar 30, 2011 | Dayton (3E405) Gas Radiator Heater

1 Answer

The water heater red light keeps flashing rapidly on my Powervent 2 model 41VRP40N. It is not producing hot water and when I read the manual it says it needs more heat. What does this mean. How do I fix...


There are many things to check. The single most important test is for 24V at the gas valve after the ignitor is supposed tp be on. 19 V or less and there is either a bad ground or the ingition control board has failed. (Wire ground problems are a high probablilty)

Here is what the book says:

PROBLEM #1 - HOT SURFACE IGNITOR DOES NOT GLOW RED

(Remember to wait for purge time, 17/34 seconds, on models so equipped).

Possible causes

A. No main power

B. Faulty transformer

C. Faulty thermostat

D. Faulty limit switch

E. Faulty blower interlock switch

F. Faulty hot surface ignitor

G. Faulty ignition control

Solution

Step #1

Perform normal system checks of main power, transformer, thermostat, limit

switch, blower interlock switch, and replace faulty component.

Step #2

With power on and thermostat set at its highest position, check voltage

between "TH" and "TR" on HS780 ignition control. If 24 volts is not present

check output at transformer. If no, replace transformer. If transformer

checks out OK look at other controls in the 24 volt circuit I.E.: thermostat,

limit switch, blower interlock switch. Check for 120 volts between "neut"

(L2) and "120" (L1). Check for 120 volts at the ignitor across "IGN" and

"IGN" terminals on the HS780 ignition module. If 120 volts is present,
replace ignitor. If no, replace the 780 series module

PROBLEM #2 - IGNITOR GLOWS RED BUT MAIN BURNER

WOULDN'T LIGHT

Possible causes

A. Improper ignitor alignment

B. Faulty ignition control

C. Faulty gas valve

D. High inlet gas pressure

E. Polarity reversed

F. No earth ground

Solution

Step #1

Check for availability of gas at gas valve. Make sure the manual valve

upstream of the gas valve and the gas valve are in the full on position. Also

make sure gas is being supplied to the system at the proper pressure, too

high will lock-up the valve.

Step #2

Check proper polarity of "NEUT" and "120" on the ignition control by reversing

the wires, if reversed gas valve will not open. If this does not solve the

problem, replace wires as they were.

Step #3

Check for proper ignitor position.

Step #4

Check for a good earth ground by using a meter connected between L1

and furnace chassis. Should read 120 volts, if no, check and/or repair ignition
ground wire or ignition control mounting screws.
CAUTION POLARITY MUST BE OBSERVED

Step #5

Check for 24 volts at the gas valve terminals; "1" and "2" on a 7200 series,

"M" and "C" on a 7100 series, "TH" and "TR" on a 7000 series. If yes,

check wire integrity or change the gas valve. If no, change the 780 series
ignition module.

That is pretty much all of the troubleshooting required.

Thanks for choosing FixYa,
Kelly

Feb 14, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

Just installed a 425 hn, the igniter clicks and the pilotflame goes on and off at the same rate as the igniter clicking. The main burners will not kick on. Checked all the electrical connections, checked...


I am not aquainted with the Bosch..... But it is a heater. I am going from past experience with gas furnaces and how the process works..... You said that you can get the pilot to stay on if you unhook the Main Gas Valve wire. Do you have 24 Volt power on that wire to Common? Does this have a Flame Sensor? Maybe it got damaged. Does it have a good ground from the burner to the ignition control module? Does that wire to the electro valve go into a plug that plugs into the ignition control.... Maybe that pin is not making contact to the board. Hope this helps If no one else answer right away repost Or call and see if you can get Tech support from Bosch..... I know how frustrating it is you buy something brand new and it doesn't work

Feb 01, 2011 | Bosch 425HN NG Tankless Water Heater

1 Answer

80 series kenmore gas dryer. Won't dry clothes. Igniter glows, gas valve opens, flame lights. Stays on for about 45 seconds then flame shuts off. About 1 minute later it lights again but it doesn't stay on...


Did you get a solution yet? - our dryer is doing the same exact thing....last time it was not lighting at all and we found out it was the thermal fuse - very cheap fix...this time the symptoms are exactly as you described.

Aug 03, 2010 | Kenmore Dryers

1 Answer

My York Stellar PLUS furnace (Model P2UDD12N07601C) will not stay on; The ventilator fan runs, the main blower runs, the igniter comes on for approximately ten (10) seconds and you can hear the gas valve...


Check gas pressure, inspect manifold & make sure there is not a blockage.Make sure gas is present and main gas shut off valve to furnace is on also check the knob on the 24 volt gas valve and see if it is in the on position , check the MV terminal on the gas valve to 24 volt common with a volt tester to see if you have 24 volts present, if you do have 24 volts at gas valve, replace valve. if you do not have 24 volts at gas valve check high limit control & roll out limits for a open circuit, Good luck.

Feb 20, 2010 | York Furnace Draft Inducer Blower Fasco #...

1 Answer

Rheem gas water heater it won't stay lit...will lite up and go off after 20 seconds or so. If I leave it sit for 20 minutes the exhaust fans blows but no flame and I have to turn off gas and refire up to...


For the main gas valve to come on several conditions need to be met.

The system must detect a pilot light prior to turning on the main gas valve for systems with a standing pilot light (not sure what your system has) and on systems with auto igniters (spark or ceramic heat glo) the control board must detect a flame present at the main burner a few seconds after the main gas valve turns on.

The other condition that must be met on systems with power exhaust systems is a vacuum/pressure diaghram switch must be made and stay made telling control circuits that vacuum/pressure is present = power exhaust fan is on and working.

From your description it sounds as if you may have a dirty/failing flame detector (thermocouple). Remove it and give it a good scrubbing with a scotch brite pad etc. cleaning off any carbon or corrosion/gunk re-install and try it out, or simply spend $15.00 or so and install a new one to be sure. The thermocouple is the metal thin tube that protrudes into the pilot and/or main burner flame and is connected to the main gas valve by a thin capilliary tube.

To check the vacuum swich on the blower a multi meter across the switch terminals looking for a steady "state change" as the blower runs/stops will work.

Oct 24, 2009 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

I have a Rheem (Criterion) unit and i'am having promblems with the main burner staying on. When i turn the unit on everything operates like it should up to the main burner staying on.Once the main flame...


Run a wire from the sensor down to the control board conector. Bypass the sensor wire around the connector in the blower deck.
The connection can be wire nutted on the sensor lead with the wire (16 or 18 guage stranded wire works) routed through the blower deck to the other side of the plastic wire connector on the blower deck.
The Sensor operates at high voltage but very low current. The connector will sometimes fail due to humidity or wear.
I have seen this on the Rheem or Ruud furnaces.
Hope this helps.
Matt

Jan 07, 2009 | Heating & Cooling

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