Technical no hot air
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Technical no hot air
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air inside?
Bernievarian
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Hi and welcome onboard !!
Temp regulation is not done the conventional way (hot water inlet adjust) on the Grande, but via air flaps that mixes cold and hot air to achieve the desired setting ...
You probably have a disconnected flap
BRs, Bernie
If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
Temp regulation is not done the conventional way (hot water inlet adjust) on the Grande, but via air flaps that mixes cold and hot air to achieve the desired setting ...
You probably have a disconnected flap
BRs, Bernie
If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
You say the vents are 'working'. Is that opening and closing, or can you feel air coming through. If so is it hot or cold?
As said above, there are flaps in the heater housing that direct the air and are responsible for mixing hot and cold to give the desired temp.
Possibilities:
1. Fan not blowing.
2. Flaps not moving.
3. No heat in heater, but you've said that is ok.
GP is a sister of the Corsa. Early Corsa had a problem with fans seizing. These were in a housing behind the glovebox on Corsa, so likely same on the GP.
Three things for you to do next.
1. Ensure hot coolant is passing through the heater box. Feed and return hoses under bonnet will facilitate that.
2. Is the fan running, check all speeds. If not working at all, check fuses, then suspect fan. If running on fast only, there's a resistor pack somewhere that has failed. Someone more conversant with GP will advise.
3. See if flap levers move when controls are moved. May require removal of glovebox, and/or being upside down in the footwells.
As said above, there are flaps in the heater housing that direct the air and are responsible for mixing hot and cold to give the desired temp.
Possibilities:
1. Fan not blowing.
2. Flaps not moving.
3. No heat in heater, but you've said that is ok.
GP is a sister of the Corsa. Early Corsa had a problem with fans seizing. These were in a housing behind the glovebox on Corsa, so likely same on the GP.
Three things for you to do next.
1. Ensure hot coolant is passing through the heater box. Feed and return hoses under bonnet will facilitate that.
2. Is the fan running, check all speeds. If not working at all, check fuses, then suspect fan. If running on fast only, there's a resistor pack somewhere that has failed. Someone more conversant with GP will advise.
3. See if flap levers move when controls are moved. May require removal of glovebox, and/or being upside down in the footwells.
multipete
Established member
/res/. ???
The heater is not normally fed from the expansion tank (reservoir).
Look for where the hoses go into the bulkhead, to the heater, at the back of the engine compartment. They are usually two, close together.
One comes from near the top of the engine (feed to the heater), the other normally tees into the hose to the bottom of the radiator (return). Check these for temp.
If you have any cold hoses, once the engine is warm, then there is either an airlock (common after any leak or coolant replacement), a blockage (rare), or possibly a thermostat failure (common). Is the temp gauge reading midway, or is engine running cool also.
Look along all the hoses for any bleed valves. There might also be one at the top of the radiator. Once hot, open each to ensure coolant dribbles out, and any air is expelled. Take care not to burn or scald yourself.
From cold, so that all hoses and radiator are cold, start engine. Top hose, from thermostat (if 1.2 at gearbox end of cylinder head) to top of radiator should stay cool, getting gradually warm just due to heat conduction, then suddenly as thermostat opens it gets hot. Let go!
If it just gets hot gradually, the thermostat is stuck open, and needs replacement. Time to change the coolant too.
Is the coolant level correct?
Has it been dropping? Has this been addressed?
If there are leaks, these need to be identified and fixed.
Look for where the hoses go into the bulkhead, to the heater, at the back of the engine compartment. They are usually two, close together.
One comes from near the top of the engine (feed to the heater), the other normally tees into the hose to the bottom of the radiator (return). Check these for temp.
If you have any cold hoses, once the engine is warm, then there is either an airlock (common after any leak or coolant replacement), a blockage (rare), or possibly a thermostat failure (common). Is the temp gauge reading midway, or is engine running cool also.
Look along all the hoses for any bleed valves. There might also be one at the top of the radiator. Once hot, open each to ensure coolant dribbles out, and any air is expelled. Take care not to burn or scald yourself.
From cold, so that all hoses and radiator are cold, start engine. Top hose, from thermostat (if 1.2 at gearbox end of cylinder head) to top of radiator should stay cool, getting gradually warm just due to heat conduction, then suddenly as thermostat opens it gets hot. Let go!
If it just gets hot gradually, the thermostat is stuck open, and needs replacement. Time to change the coolant too.
Is the coolant level correct?
Has it been dropping? Has this been addressed?
If there are leaks, these need to be identified and fixed.
