What is the spark plug gap for a Readdy Heater 35000 BTU?

The electrodes might need cleaned. I am attaching a link, please check out the FAQ section, then scroll down and click on FAQ for spark plug heaters. I hope this helps. Reddy Heater Parts Sales Online Mr Reddy Heater Parts Master Heater Parts...

Maybe replace the thermocouple.

Does your heater have an oxygen sensor on it? If so try gently cleanig dust,lint or other debris from it . If that does't help I would replace it. I hope thishelps you. Thanks

the thermocouple is bad.it needs to send a signal to the gas valve to say it's okay to stay running.replace it and the problem should go away.if not let me know

check to see if the ignitor has not fallen off the back of motor.it's held on by two 2 screws that do vibrate off.if they are on you need to replace the ignition modual.they cost around $80.00 to $100.00

my heater will not stay running

Please answer the following questions. There are several folks on the board that can help but we need to know some vital information so we can get started. Answer these, if you can:

1. Which Pro 110 do you have. We need the exact model number. Pro 110 is a series of heaters.
2. Does the heater have a spark plug or a glowbar (HSI)?
3. When the motor runs is it pumping fuel?
4. When the motor runs is the spark plug firing (or glowbar glowing)?

Need parts for readdy Heater Pro 110 New

My unit is a kerosene 35000 btu unit...just had similar issue.
It is very possible that the spark plug is

1. fouled out (dirty)
2. mis-gapped

take the top cover off, you will see the plug. There is a sheetmetal plate held on by two screws holding the ground, plug, and nozzle together. It is easier to just remove the plate (you will have problems with the plug nut if you don't).

remove the plug with a plug socket, probably 5/8.
I used brake parts cleaner to spray off the electrode of the plug then a wire brush to clean it.

check your plug gap...this might be crucial. my gap was specified on a label stuck on the inside of the bottom of the body. The plug on my unit was way too small. Adjust gap if necessary using feeler guages.

reinstall parts and plate. (I actually tack-welded the plug nut into place for ease of maintenance later). Note that the electrode needs to be a specific angle, relative to nozzle....probably diagrammed on the same label as the gap spec.

replace top and see if she'll fire up.

...last note...also might check your fuel pickup/filter. It is located behind the side panel in the unit

good luck...hope I have helped you

www dot desatech dot com is a parts distributor for reddy heat products. on their main page they have a short troubleshooting guide. the motor needs to provide 3.5 psi of air across the fuel nozzle to suck the fuel out of the reservoir. check your ignition source (spark plug, hot surface igniter) if the hot surface igniter is broken get a new one, if the spark plug don't spark, check the gap might be too big. see if the spark plug is grounded. poor grounds will cause intermittent sparking. check the high voltage wire for breaks in the insulation, might be shorting out to ground BEFORE the plug. gap should be 75 thousandths.