Allpro convection heater model# mh200cv wont stay burning

Dale Koehn

• 88 Answers
• Posted on Jan 20, 2009

SOURCE: MH 18 B wont stay lit

sounds like you have a limit safety issue, the unit is over heating and kicking out on high limit, or the limit is weak, either way you should look into replacing the limit, hope that helps

SOURCE: Stays lit for 25 minutes and shuts off

How large and sealed of an area are you using it in? I ask because those units have a low oxygen sensor which will shut it down if there is not enough oxygen in the space.(kinda prevents that pesky suffocation thing). Otherwise if using it in larger cold spaces, the issue is can be from the smaller tanks. As mentioned above, a larger tank can solve this, because these units have a fairly good input rate, which will cause the smaller tanks to freeze, and lower the propane temperature and evaporation rate, basically runs out of gas until the tank warms back up.

SOURCE: pilot will not stay on

replace your regulater,which almost cost as much a a new heater.I have own 4 or 5 and finally got a good one,I have in the past cleaned out the regulator that was plugged with oil from the propane,they put oil in the propane for leak detection,I hope this helps you

Testimonial: "Thank You. perhaps it is not adjusted properly. I so appreciate the quick response..Good Job!!!"

SOURCE: Is it o k to bend the thermocouple tip. The only

Bending it will ruin it. You need to find out why the pilot flame is not as strong as it should be.

It is usually caused by bugs or spiders having gotten into the small air mix jet of the pilot assembly and died or built a web or, there is some dirt from the fuel that is partially clogging the fuel tube leading up to the pilot assembly, or plugging the orifice.

Testimonial: "worked perfectly"

SOURCE: heater will not stay lit

you need to change the thermal couple (small sensor by pilot)