V70 heater

FIBAMAN · Jan 3rd, 2021, 14:53

I find that my heater does not appear to modulate to keep a steady temperature in the car. It is very noticeable that the warm air flow runs for a while then there is a noticeable change to colder air for a while then back again.
Is this normal, or is there a control issue?

V70Zig · Jan 4th, 2021, 18:00

I think that's the normal operation as it's trying to keep the temp constant at the temp you have set it at.....so blows hot, then when the temp sensor see's that is over what is set to it will then blow cooler, then hotter then cooler....always trying to maintain your desired setting....
Hope this helps.

You could try a quick vac of the sensor vent in the centre console though...crap does build up and affect it.

Jan 3rd, 2021, 14:53	#1
FIBAMAN Junior Member Last Online: Sep 10th, 2022 14:42 Join Date: Oct 2017 Location: CHESTER LE STREET	V70 heater I find that my heater does not appear to modulate to keep a steady temperature in the car. It is very noticeable that the warm air flow runs for a while then there is a noticeable change to colder air for a while then back again. Is this normal, or is there a control issue?

Jan 4th, 2021, 18:00	#2
V70Zig Master Member Last Online: Apr 10th, 2024 16:20 Join Date: Sep 2012 Location: Loughborough	I think that's the normal operation as it's trying to keep the temp constant at the temp you have set it at.....so blows hot, then when the temp sensor see's that is over what is set to it will then blow cooler, then hotter then cooler....always trying to maintain your desired setting.... Hope this helps. You could try a quick vac of the sensor vent in the centre console though...crap does build up and affect it. __________________ 2008 V70 SE D5 Auto 185 ...now 205 Volvo Polestar......190k Passed away - 1999 V70 2.5tdi Auto 340632 miles, RIP. Last edited by V70Zig; Jan 4th, 2021 at 18:04.

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