Cab heat

[Tunder123]

Any help please? My. M7040 kubota. Is not pushing out heat in cab, has been flushed and thermostat replaced engine temp is normal blower works but only cold air.

 

[murphy1244]

air in the line.

 

[grsthegreat]

hmmm, when you rotate the heat level dial, can you feel resistance. There should be a cable that connects from the dial to the valve directing flow of hot water thru the coil. There is also duct that controls air flow thru the exchanger.

 

[art]

check both hoses going in and out of the cab for heat. There could be a problem in the control but it is not normal.

 

[Tunder123]

Have checked both hoses going in to cab they seem cool to touch? Shouldn't one be warm?

 

[grsthegreat]

Have checked both hoses going in to cab they seem cool to touch? Shouldn't one be warm?

yes, on mine one is very hot to the touch. What i dont know is what tells the lines to open and make hot water flow thru system. There must be a control valve up in your unit. In automobiles, there is a cable the directs amount of hot water flowing thru condenser coil i believe....at least thats my understanding. In this way when you go into A/C mode, the hot water doesnt flow thru unit. This cable connects to the dial that controls amount of heat

 

[Tx Jim]

Have you checked for any blown fuses? Heat is controlled by electric servo motor. How high is temp gauge getting after 30 minutes of engine operation????

 

[AStanton]

Do you smell anything funky? Maybe some mice built a nest in the fan or general area.

 

[Tunder123]

Engine gauge in the normal range,fuses under steering all good are there. Others? Control knob does not have a lot of resistance ? Will work on it again tomorrow

 

[grsthegreat]

Engine gauge in the normal range,fuses under steering all good are there. Others? Control knob does not have a lot of resistance ? Will work on it again tomorrow

the control knob on most a/c heat units should have resistance as it is connected to a cable that leads to the valve allowing hot water to flow thru heater core. Im not familiar with the Kubota system, but i doubt it varies much from the average car heater in that respect.