Heater Problems

[LAYOUTTECH]

Have A 93 K1500 Fan Works But The Heater Doesn't Get Hot. Its Lukewarm. Back Flushed The Heater Core And Hoses. Any Ideas Why It Doesnt Get Hot?

[Mikado14]

Does your engine get up to operating temp? Have you checked your thermostat? Just for starters.

[LAYOUTTECH]

I Put A Hi-po Chip In And A 160* Thermostat. The Engine Has Never Got Above 120* To 130*, Even When I Had The Factory Rated Thermostat.

[SageCuda]

Interesting. I thought standard operating temp was up around 190.

[LAYOUTTECH]

Its Been Like That Since I Bought The Truck About 6 Months Ago.maybe A Inaccurate Gauge? Thanks To All. All Comments Greatly Appreciated.

[broughy84]

Check this with a manual guage or a thermometer in the radiator. My 88 normally runs at about 180*-200*. I would also run a can of radiator flush in it and change the antifreeze.

[Cam7]

I had this problem with my 90 1500. Disconected the heater hoses at the core and blew out the core with Air. Had blockage and heat was restored.