I have a 2010 plate Renault Modus. The heaters keep going on and off. Some days they work some days they don't. When they're not working they can suddenly just start working again as I am driving.

can anyone help?

Thank you

I guess you mean the heater fan keeps going off and on, the fault is the blower motor resistor pack or its connector. If its the connector you will probably need an auto electrician to replace the connector, if its the only resistor pack you might be able to replace it yourself or get an amateur to do it.

Being intermittent my bet is on the connector but you might need to replace both depending on how much heat damage there is (it melts).

Please don't go to a main dealer for a price, its dangerous.

Drop into Advanced Auto Electrical at Rock Ferry, they'll be able to give you some advice.