Question about Heating & Cooling

1 Answer

Pilot not working on Comfortmaker


Posted by on

  • Dale
    Dale Apr 22, 2014

    The gas control valve is a Honeywell SV9501



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 180 Answers

If pilot wont stay light, possibly thermocouple may need replacement. Probably a service tech should come out, I do believe there should be 24 volts, not 18, but unit may be different.

If you need further help, reach me via phone at

Posted on Apr 26, 2014


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Pilot will not light

The Pilot indicator will appear to line up with the arrow on the base, and even push in as though allowing gas to flow, but if it is just 1mm out of alignment, no gas will flow. So the solution is to move the valve in the Pilot mode slightly in one direction or the other to see if/when gas flows.

Posted on Nov 07, 2008

  • 3315 Answers

SOURCE: cozy gravity one sided wall heater...pilot won't

how by extending the duct work will it make the gas valve work ?

if the pilotkeeps going out clean pilot jet , or if the power unit has gone in the gas valve then you would have to change the valve , don't get the flue bit ?

Posted on Feb 24, 2009

  • 462 Answers

SOURCE: Carrier Furnace 58gs075-1 Circuit board issues...

I cant see your wire diagram but trace the circut your talking about. I believe it usually goes through a series of safety switches. Put your VOM across each individual switch. If you get 24 out from the board the first 1 you check and get 24v is open and not feeding back to the board is out. FIND out why. the switch could be bad but it may be indicating a more involved problem, just look aroeund for chared wires or tell tell signes of flame roll out or if its an open (fuse link) suspect what can cause an over heat condition anythign from a bad board or too long an off cycle before the indoor fan comes on ect. PONIT IS Once you come across the cause may not be the reason.
Please grade me accordingly and if you need more I need more info from you. 

Posted on Mar 02, 2009

  • 3433 Answers

SOURCE: pilot light not working in gas heater

That probe that sits in the pilot flame is at fault. Remove and replace. Inexpensive fix. Make sure probe is in the tip of the pilot flame. If it does not stay hot enough, it will shut off the gas.

Posted on Jun 01, 2009

  • 108 Answers

SOURCE: big old Hydro Therm boiler rolls out flame at

This may be normal it's hard to tell from your description , The flame could possibly rollout for a second or 2...depending on the venting , how far the vent is from the chimney shouldn't hear a "Mini Explosion" you may hear the gas ignite with a bit of a woooosh...depending on the size of the boiler this could be quite normal...Boilers can be dangerous when they get plugged up or dirty....although Hydrotherm makes an EXCELLENT Cast Iron Boiler...I would still have it checked by an expert to be on the safe should also have a "Slow Opening" valve which would eliminate that problem if the valve is working correctly , but it's possible it was replaced at some point with a regular opening valve and this could be the reason as well

Posted on Nov 01, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 1999 comfortmaker heat pump i need to know if the revercing valve is normal in heat or cool

not sure if this helps but is how it works...
Comfort Maker energizes the reversing valve in cool. The reversing valve coil should be wired to "O" from the thermostat. Take the wires off the the reversing valve coil, it should switch to heat. If it does not, and the compressor is running, the reversing valve is bad! Replace it.

Note: that clicking sound you hear was the pilot valve in the reversing valve. Within a couple of seconds of hearing that click, it should have reversed. IF it does not, you have a bad valve.

Electricity switches the pilot valve. The pilot valve switches the Freon pressure. Freon pressure switches the reversing valve.
hope this makes sense.
best to you.

Dec 31, 2017 | Heating & Cooling

2 Answers

My comfortmaker furnace has an electric ignitor. It works fine but the spark it creates isn't lighting the pilot. What should I do?

Move the spark source close to the pilot flame area by bending or another method of adjustment.

Apr 12, 2015 | Heating & Cooling

1 Answer

Pilot light won't stay lit after releasing when lighting gas fryer

This symptom indicates something wrong with the millivolt system. Start by checking the wires from the thermopile to the gas valve, insuring they are all tight and in place. Check the hi limit thermostat, if you have an ohm meter it should read .1 or .2 across it. With you meter set to dc millivolts, and flame present on the pilot, read across the thermocouple wires (red and white) to see the millivolts generated, with the thermostat off and the gas valve in pilot position you should get approx 600 millivolt plus minus 50. The pilot will have to be on for a minute or so to get maximum millivolts. If the millivolts are correct, hi-limit closed, and all wiring is connected, you likely have a faulty gas valve. If the hi limit reads more than .1 or .2 replace the limit, if you are not getting the millivolts from the thermopile, replace it.

Apr 05, 2013 | Imperial IFS-40 - Gas Deep Fryer - 40 Lb -...

1 Answer

Heater pilot wont stay lite when youn let off the pilot button the flame goes out

First make sure the flame is at least 1 inch high and hitting the pilot generator (a metal tube about round as a pencil and 3 inches long with 2 wires coming from it to the gas valve). If there is not a good flame, then the burner tray needs to be removed and you need to use a paper clip and clean out the hole on pilot generator. Spiders like to make a nice web in that small hole.Reconnect burner tray and light again. If there is a good flame, the next step will take 2 people and a multi meter. while one person holds down the button on the gas valve to keep the pilot lit, the other person turn the multi meter on and set it to the millivolt setting. Take the 2 leads and touch them to the end of the two wires that come from the pilot generator to the gas valve after holding down the button for one minute with pilot lit, test the millivolts, if the reading is not at least 400 millivolts, then the pilot generator needes to be replaced.

Aug 29, 2011 | Pentair Pool & Spa

1 Answer

Can't light my Raypak Pool Heater.

Often you can see the pilot if you use a small mirror. With the button on the gas valve pushed down you should get pilot. Once the pilot is lit it warms the TC(thermocouple) creating the static charge to open the gas valve on it's own. The TC is set in the pilot assembly. It will be a small tube like piece with the wires coming from it. Some times you can pull and replace it but I will usually get the whole pilot assembly and just replace that. It will probally be rusted and can be cloging the tiny orface on the pilot itself.
If you have a milivolt meter you can check the TC by pulling the wires that come from it at the gas valve and with the button on the gas valve pushed in and a good flame you should get 500-700 MV from the TC. This is 1/2 a volt+ so you will need a MV meter. But this will tell if your TC is bad or if your valve is bad.
Good luck.

May 12, 2010 | Raypak Free Hydraulic Lift Gate Delivery -...

1 Answer

Model LG Lite 2 pilot is lit but the burners will not light. pressure switch is working corectly, on off togle switch is working, all wires are good(tested with ohm meter) what could be wrong?

If this is a standing pilot you will want to check your voltage out put from the pilot. For this you will need a milivolt meter. The pilot should supply 500-700mv (1/2-3/4v) It only takes 200mv to open the pilot valve but needs another 300+ to open the main half of the gas valve. This would be the first thing I would check. If this is the problem you will need to replace the pilot assembly. If your getting the power you need from the pilot then it is probally your gas valve itself. Good luck.

Apr 25, 2010 | Jandy Lite 2 Natural Gas Pilot Light...

1 Answer

Raypak boiler nat gas for domestic hot water model W2-0514BEARDAA or 334-056197 having problem with no gas to gas valve, trying to diagnose gas selenoid valve that is pre-gas valve. Pilot lights but...

Guessing you have a milivolt heater. While your pilot will light when you push the pilot light button down you need to generate 200mv to open the selenoid for the pilot and another 300mv for the main valve. This can be checked by removeing the leads from the pilot generator (wires from the pilot), Push the pilot button down and hold in place (a small screwdriver wedged in becide the button will do this) Then check the milivolt reading from the generator. This reading should be between 500 and 700mv (1/2 to 3/4 of a volt) If you don't have this your pilot generator is bad.
If you do then you need to hook the leads back up to the valve and unhook the saftey circut leads and try to light the pilot again. If the pilot still won't light your gas valve is bad. If it does then you have a problem in your saftey circut and you will need to check each item in the circut by removing and jumping past.
This would be more in line with just the main side of the valve not opening. So I'm sure you will find it to be the pilot generator or the valve being bad. As I stated before this system only runs on 1/2 a volt so all connections need to be clean and tight also. Could be other problems but this should cover the common reasons. Good luck.

Mar 12, 2010 | Raypak Free Hydraulic Lift Gate Delivery -...

1 Answer

Where can i find a manual for an old comfortmaker gas furnace that's about 50 years old. The model #GC400050-08M. The blower works and the pilot light is on, but no heat is coming out of vent. The flames...

Tie red and white wires together after removing thermostat from wall, if unit comes on replace thermostat, if not check limit controls for continuity, Good luck.

Mar 02, 2010 | Heating & Cooling

1 Answer

Blower but no heat, no gas or no pilot ignition?

The pilot has to be lit.And to do so turn the knob to pilot.Then press it down and gas will come threw the pilot,then light the pilot,and hold the button down for about 45 seconds,count slow.The pilot has to heat the thermocouple up before the pilot light will stay on.Once it stays lit,turn the knob to on.

Oct 20, 2009 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

43 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3315 Answers

Tim Whalen

Level 3 Expert

3074 Answers


Level 3 Expert

80637 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides