My 30-55,000 Ready propane forced hot air heater was not igniting so I replaced the regulator , hose and even an new propane tank. Now I can get a flame , but the heater blows out cold air even when wide open. when I turn the heater down it goes out. Is this problem the regulator or thermo couple?

15. Nozzle and Fuel Line

Visually examine the nozzle and fuel line

for foreign material or other damage. If

you find blockage or damage, repair or
replace as needed.

29. Thermocouple

Turn off gas supply. Remove thermocouple

from gas valve. Using a digital

multi-meter set to the lowest DC millivolt

setting (meter needs to have alligator clips

on ends of leads), clip black lead to the

very tip of thermocouple (end removed

from valve). Clip red lead to the outer casing

of thermocouple for ground. Relight

unit output should be between 18 and 28
millivolts.

28. Control Valve

Turn off gas supply to heater. Remove

bottom of base (if equipped). Remove thermocouple

from valve. Using a digital multimeter

in the lowest ohm's setting, place

the red lead to the internal center of valve

(where thermocouple was removed) and

black lead to casing of valve for ground.

Resistance should be between 100 to 200

milliohms. Higher resistance indicates a

short in the Electromagnetic Power Unit.

Lower resistance indicates a broken wire
in the Electromagnetic Power Unit.