Where all the adjustments for a modine gas valve

check gas pressure

do u require a manual? plse also provide the model number of ur device

Pilot flame can be adjusted at gas valve something you may want to call a trained technician for. If the gas valve won't adjust down you may need to replace the gas valve. Also, celebrate valve ingoing pressure at 3.5 and outgoing at 4.0 & 4.5 of some

http://www.manualsonline.com

You may have a bad heat exchanger

Select thermostat to off. Take front upper panel off of furnace. Looking at gas valve you should see a flat head or straight slot screw. This is the cap to access the adjustment. Look at the body of the gas valve real close. You may need to put on your glasses or use magnifying glass. It should say pilot in very small raised letters. Remove the cap. Look down into access hole and you will see the adjustment screw. It is a nylon screw so be careful not to strip it out. Place the correct screw driver, should be a small phillips or straight head. Turn gas valve to pilot and depress. Light pilot. While holding down, adjust nylon screw clockwise until flame envelopes 3/8 to 1/2 inch around thermocouple. Replace cap. Select heat and verify pilot stays lit. If the flame doesn't stay lit most likely your thermocouple is defective. You can purchase at your local hardware or Home Depot. Length doesn't matter.The thermocouple is heated and sends a DC signal back to the gas valve. There is another screw cap on the gas valve that adjusts gas pressure. Do not try to adjust the gas pressure to the gas valve because you need a special instrument (manometer) to adjust pressure. This device measures the water colume of the gas. A qualified technician would adjust this to 3.5" WC. for natural gas or 11" for propane.

bad flame sensor

that sounds like the limit look for a little round thing with two wires with a button between the wires push it to reset it but there could be several of them even one buy the blower motor there is also a high limit in the center of the furnace all you see is two wires if that one is out you have to remove it two screws then just drop it on the floor it will free the numeral bymetal inside put it back on and you should begood

Look on the side or bottom there will be a little circular door held on with one screw it will swing from side to side there should be a long wire with a hook on the end that looks like a key ring this is used for holding the match if you can't find the match holder in the bottom of you unit find some way to get the match up to the pilot head then turn your gas valve to pilot position and push in on the button while holding the button in light the match hold it to the pilot head once the fire lights continue to hold the button down for 10 seconds then instantly let off the button and turn the knob to the on position and your set .

Hope this helps......

sure, just make sure u use a tee connector seal well and test range first. natural gas has very low pressure.