My 1991 Honda Accord's Temp Gauge only goes 1/4 of the way up. I also have no heat I was wondering if the t-stat is opening to soon.

 

I had no heat before some trouble i had, Turned out it was the water pump not pushing the water into the heater core and out the bleed hole. You checked lvls and fluid loss ect ?

 

My levels are good and I do have a small leak in my radiator. I get just enough heat to defrost my windshield. I flushed my heater core and it wasn't clogged. When I give it gas the heater blower blows faster and that is it.

 

You should measure the temperature of the thermostat housing with an pyrometer ( infra red temperature gun ) as the vehicle is warming up. Observe the temperature at which the thermostat opens and measure the end temperature when fully warmed up.

Use the same tool to measure the temperature of the heater hoses on each side of the heater control valve. Make sure the valve is opening up and allowing coolant to flow. Use the same tool to measure the inlet and outlet temperatures of the heater hoses at the heater core. Make sure coolant is flowing through the heater core.

Make sure the blend door is moving properly allowing air to completely flow through the heater core when the hottest temp is selected.

There are a lot of things that can cause your symptom.