ALKOTA radiant heater burns dsl or kerosene. 150.000 btu model. Dealer says it needs a new fuel pump. Pump costs 1100.00 dollars. Already put new fuel lines, new nozzle and flame sensor which totaled 529 dollars. Bought the heater in Jan 2018. Used only periodically to heat the shop. Up until this point, no issues. Also have an external thermostat for it too. Seven 85-four 9 nine -three 077